fix: keep electrum connection on background

[pwltr]

Description

Don't intentionally disconnect from Electrum on app to background. This will keep connection up until the OS cuts network access. Reconnection is handled in beignet.

Linked Issues/Tasks

Potentially improves #2004

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Refactoring (improving code without creating new functionality)

Tests

• Detox test
• Unit test
• No test

QA Notes

App should reconnect to Electrum

[limpbrains]

I thought iOS will automatically kill an app in this case, not just close the connection

[pwltr]

I thought iOS will automatically kill an app in this case, not just close the connection

Doesn't seem like that is the case. I tested a bunch on Android and on the iOS simulator and it works fine. We also had it like this before #1450, just the polling has moved to beignet.

Would be nice to get this in for this release because I think it fixes #2004

[pwltr]

Tested this again and it does seem like it helps with issue 2004

[catch-21]

Verified in 2e3cf89
I've used a real iPhone 15 (iOS 17) and iPhone 12 (iOS 14) in the farm, closed the app and left it for over 5 minutes, on restore the app was still running, iOS hadn't killed it. No errors shown either.

[limpbrains]

Nice!