Adapt AddressBookTestingTool to work with the Bytes format for system transactions

[IvanKavaldzhiev]

Problem

The AddressBookTestingTool should be adapted to generate StateSignatureTransactions and the AddressBookTestingToolState to differentiate these Bytes in handleTransaction and ignore the system transactions.

Solution

Update the TransactionGenerator in AddressBookTestingTool to generate StateSignatureTransactions and encode them in Bytes.

Update the handleTransaction in AddressBookTestingToolState to validate whether the Bytes wrapped in EventTransaction's applicationTransaction is a system transaction.

Alternatives

No response