MetricsLogger: listen to connection change

AdapterProperties was listening to intent in order to log, this is
exactly the role of the MetricsLogger to listen on event and generates
appropriate logs. The AdapterProperties has nothing to do with that.
So I am moving the code there

Test: atest BluetoothInstrumentationTests
Bug: 311772251
Flag: Exempt refactor moving code without op change
Change-Id: I3ca86dcf0084ebdb39b9be9aefe3466f6f9f5457