isotest: Add support for creating/synchronizing to multiple BISes

This adds an additional command line option for the Broadcast exercise,
so that the user can indicate the number of BISes to create as part of a
BIG (Broadcast Source), or the number of BISes to synchronize
to (Broadcast Sink).

For the Broadcast Source exercise, issue the following command,
in order to create a BIG with handle 0x01, associated with the
advertising handle 0x01, with 2 BISes:

    tools/isotest -i hci0 -s 00:00:00:00:00:00 -N 2 -G 1 -T 1

The isotest and btmon logs will look something like this:

isotest[7178]: mgmt socket: fd 3
isotest[7178]: mgmt_set_le: err 0
isotest[7178]: mgmt_set_experimental: err 0
isotest[7179]: Exit
isotest[7178]: Connecting 00:00:00:00:00:00 ...
isotest[7178]: Connected [00:00:00:00:00:00]
isotest[7178]: QoS [BIG 0x01 BIS 0x01 Packing 0x00 Framing 0x00 Encryption 0x00]
isotest[7178]: Input QoS [Interval 10000 us Latency 10 ms SDU 0 PHY 0x00 RTN 2]
isotest[7178]: Output QoS [Interval 10000 us Latency 10 ms SDU 40 PHY 0x02 RTN 2]
isotest[7178]: Connecting 00:00:00:00:00:00 ...
isotest[7178]: Connected [00:00:00:00:00:00]
isotest[7178]: QoS [BIG 0x01 BIS 0x01 Packing 0x00 Framing 0x00 Encryption 0x00]
isotest[7178]: Input QoS [Interval 10000 us Latency 10 ms SDU 0 PHY 0x00 RTN 2]
isotest[7178]: Output QoS [Interval 10000 us Latency 10 ms SDU 40 PHY 0x02 RTN 2]
isotest[7183]: Sending ...
isotest[7183]: Number of packets: 1
isotest[7183]: Socket jitter buffer: 80 buffer
isotest[7183]: [seq 0] 40 bytes buffered 92 (3712 bytes)
isotest[7184]: Sending ...
isotest[7184]: Number of packets: 1
isotest[7184]: Socket jitter buffer: 80 buffer
isotest[7184]: [seq 0] 40 bytes buffered 92 (3712 bytes)
isotest[7178]: Exit

< HCI Command: LE Create Broadcast Isochronous Group (0x08|0x0068) plen 31
        Handle: 0x01
        Advertising Handle: 0x01
        Number of BIS: 2
        SDU Interval: 10000 us (0x002710)
        Maximum SDU size: 40
        Maximum Latency: 10 ms (0x000a)
        RTN: 0x02
        PHY: LE 2M (0x02)
        Packing: Sequential (0x00)
        Framing: Unframed (0x00)
        Encryption: 0x00
        Broadcast Code: 00000000000000000000000000000000

> HCI Event: Command Status (0x0f) plen 4
      LE Create Broadcast Isochronous Group (0x08|0x0068) ncmd 1
        Status: Success (0x00)

> HCI Event: LE Meta Event (0x3e) plen 23
      LE Broadcast Isochronous Group Complete (0x1b)
        Status: Success (0x00)
        Handle: 0x01
        BIG Synchronization Delay: 1974 us (0x0007b6)
        Transport Latency: 1974 us (0x0007b6)
        PHY: LE 2M (0x02)
        NSE: 3
        BN: 1
        PTO: 1
        IRC: 3
        Maximum PDU: 40
        ISO Interval: 10.00 msec (0x0008)
        Connection Handle #0: 10
        Connection Handle ruundii#1: 11

< HCI Command: LE Setup Isochronous Data Path (0x08|0x006e) plen 13
        Handle: 10
        Data Path Direction: Input (Host to Controller) (0x00)
        Data Path: HCI (0x00)
        Coding Format: Transparent (0x03)
        Company Codec ID: Ericsson Technology Licensing (0)
        Vendor Codec ID: 0
        Controller Delay: 0 us (0x000000)
        Codec Configuration Length: 0
        Codec Configuration:

> HCI Event: Command Complete (0x0e) plen 6
      LE Setup Isochronous Data Path (0x08|0x006e) ncmd 1
        Status: Success (0x00)
        Handle: 10

< HCI Command: LE Setup Isochronous Data Path (0x08|0x006e) plen 13
        Handle: 11
        Data Path Direction: Input (Host to Controller) (0x00)
        Data Path: HCI (0x00)
        Coding Format: Transparent (0x03)
        Company Codec ID: Ericsson Technology Licensing (0)
        Vendor Codec ID: 0
        Controller Delay: 0 us (0x000000)
        Codec Configuration Length: 0
        Codec Configuration:

> HCI Event: Command Complete (0x0e) plen 6
      LE Setup Isochronous Data Path (0x08|0x006e) ncmd 1
        Status: Success (0x00)
        Handle: 11

< ISO Data TX: Handle 10 flags 0x02 dlen 44

< ISO Data TX: Handle 11 flags 0x02 dlen 44

> HCI Event: Number of Completed Packets (0x13) plen 5
        Num handles: 1
        Handle: 10
        Count: 1

> HCI Event: Number of Completed Packets (0x13) plen 5
        Num handles: 1
        Handle: 11
        Count: 1

For the Broadcast Sink exercise, issue the following command,
in order to synchronize to the BISes created by the source:

    tools/isotest -i hci1 -r 36:13:00:E1:1B:F0 -V le_random -N 2 -G 1

The flow is shown by the isotest log and the filtered btmon snippet below:

isotest[4033]: mgmt socket: fd 3
isotest[4034]: Exit
isotest[4033]: mgmt_set_le: err 0
isotest[4033]: mgmt_set_experimental: err 0
isotest[4033]: Waiting for connection 36:13:00:E1:1B:F0...
isotest[4036]: Connected [36:13:00:E1:1B:F0]
isotest[4036]: QoS [BIG 0x01 BIS 0x00 Packing 0x00 Framing 0x00 Encryption 0x00]
isotest[4036]: Input QoS [Interval 1974 us Latency 10 ms SDU 40 PHY 0x00 RTN 0]
isotest[4036]: Output QoS [Interval 0 us Latency 0 ms SDU 0 PHY 0x00 RTN 0]
isotest[4036]: Receiving ...
isotest[4037]: Connected [36:13:00:E1:1B:F0]
isotest[4037]: QoS [BIG 0x01 BIS 0x00 Packing 0x00 Framing 0x00 Encryption 0x00]
isotest[4037]: Input QoS [Interval 1974 us Latency 10 ms SDU 40 PHY 0x00 RTN 0]
isotest[4037]: Output QoS [Interval 0 us Latency 0 ms SDU 0 PHY 0x00 RTN 0]
isotest[4037]: Receiving ...
isotest[4037]: [seq 0] 280 bytes in 6.48 sec speed 0.34 kb/s
isotest[4036]: [seq 0] 280 bytes in 6.54 sec speed 0.33 kb/s
isotest[4037]: [seq 1] 280 bytes in 7.01 sec speed 0.31 kb/s
isotest[4036]: [seq 1] 280 bytes in 7.02 sec speed 0.31 kb/s
isotest[4037]: [seq 2] 280 bytes in 7.06 sec speed 0.31 kb/s
isotest[4036]: [seq 2] 280 bytes in 7.04 sec speed 0.31 kb/s

< HCI Command: LE Periodic Advertising Create Sync (0x08|0x0044) plen 14
        Options: 0x0000
        Use advertising SID, Advertiser Address Type and address
        Reporting initially enabled
        SID: 0x00
        Adv address type: Random (0x01)
        Adv address: 36:13:00:E1:1B:F0 (Non-Resolvable)
        Skip: 0x0000
        Sync timeout: 163840 msec (0x4000)
        Sync CTE type: 0x0000

> HCI Event: Command Status (0x0f) plen 4
      LE Periodic Advertising Create Sync (0x08|0x0044) ncmd 1
        Status: Success (0x00)

< HCI Command: LE Set Extended Scan Parameters (0x08|0x0041) plen 13
        Own address type: Public (0x00)
        Filter policy: Ignore not in accept list (0x01)
        PHYs: 0x05
        Entry 0: LE 1M
          Type: Passive (0x00)
          Interval: 60.000 msec (0x0060)
          Window: 30.000 msec (0x0030)
        Entry 1: LE Coded
          Type: Passive (0x00)
          Interval: 60.000 msec (0x0060)
          Window: 30.000 msec (0x0030)

> HCI Event: Command Complete (0x0e) plen 4
      LE Set Extended Scan Parameters (0x08|0x0041) ncmd 1
        Status: Success (0x00)

< HCI Command: LE Set Extended Scan Enable (0x08|0x0042) plen 6
        Extended scan: Enabled (0x01)
        Filter duplicates: Enabled (0x01)
        Duration: 0 msec (0x0000)
        Period: 0.00 sec (0x0000)

> HCI Event: Command Complete (0x0e) plen 4
      LE Set Extended Scan Enable (0x08|0x0042) ncmd 1
        Status: Success (0x00)

> HCI Event: LE Meta Event (0x3e) plen 16
      LE Periodic Advertising Sync Established (0x0e)
        Status: Success (0x00)
        Sync handle: 0
        Advertising SID: 0x00
        Advertiser address type: Random (0x01)
        Advertiser address: 36:13:00:E1:1B:F0 (Non-Resolvable)
        Advertiser PHY: LE 2M (0x02)
        Periodic advertising interval: 10.00 msec (0x0008)
        Advertiser clock accuracy: 0x00

> HCI Event: LE Meta Event (0x3e) plen 8
      LE Periodic Advertising Report (0x0f)
        Sync handle: 0
        TX power: 127 dbm (0x7f)
        RSSI: -47 dBm (0xd1)
        CTE Type: No Constant Tone Extension (0xff)
        Data status: Complete
        Data length: 0x00

> HCI Event: LE Meta Event (0x3e) plen 20
      LE Broadcast Isochronous Group Info Advertising Report (0x22)
        Sync Handle: 0x0000
        Number BIS: 2
        NSE: 3
        ISO Interval: 10.00 msec (0x0008)
        BN: 1
        PTO: 1
        IRC: 3
        Maximum PDU: 40
        SDU Interval: 10000 us (0x002710)
        Maximum SDU: 40
        PHY: LE 2M (0x02)
        Framing: Unframed (0x00)
        Encryption: 0x00

< HCI Command: LE Broadcast Isochronous Group Create Sync (0x08|0x006b) plen 26
        BIG Handle: 0x01
        BIG Sync Handle: 0x0000
        Encryption: Unencrypted (0x00)
        Broadcast Code: 00000000000000000000000000000000
        Maximum Number Subevents: 0x00
        Timeout: 163840 ms (0x4000)
        Number of BIS: 2
        BIS ID: 0x01
        BIS ID: 0x02

> HCI Event: LE Meta Event (0x3e) plen 19
      LE Broadcast Isochronous Group Sync Estabilished (0x1d)
        Status: Success (0x00)
        BIG Handle: 0x01
        Transport Latency: 1974 us (0x0007b6)
        NSE: 3
        BN: 1
        PTO: 1
        IRC: 3
        Maximum PDU: 40
        ISO Interval: 10.00 msec (0x0008)
        Connection Handle #0: 10
        Connection Handle ruundii#1: 11

< HCI Command: LE Setup Isochronous Data Path (0x08|0x006e) plen 13
        Handle: 10
        Data Path Direction: Output (Controller to Host) (0x01)
        Data Path: HCI (0x00)
        Coding Format: Transparent (0x03)
        Company Codec ID: Ericsson Technology Licensing (0)
        Vendor Codec ID: 0
        Controller Delay: 0 us (0x000000)
        Codec Configuration Length: 0
        Codec Configuration:

> HCI Event: Command Complete (0x0e) plen 6
      LE Setup Isochronous Data Path (0x08|0x006e) ncmd 1
        Status: Success (0x00)
        Handle: 10

< HCI Command: LE Setup Isochronous Data Path (0x08|0x006e) plen 13
        Handle: 11
        Data Path Direction: Output (Controller to Host) (0x01)
        Data Path: HCI (0x00)
        Coding Format: Transparent (0x03)
        Company Codec ID: Ericsson Technology Licensing (0)
        Vendor Codec ID: 0
        Controller Delay: 0 us (0x000000)
        Codec Configuration Length: 0
        Codec Configuration:

> HCI Event: Command Complete (0x0e) plen 6
      LE Setup Isochronous Data Path (0x08|0x006e) ncmd 1
        Status: Success (0x00)
        Handle: 11

> ISO Data RX: Handle 10 flags 0x06 dlen 48

> ISO Data RX: Handle 11 flags 0x06 dlen 48