BASS: Remove logs which flood a lot and not give useful information

Remove logs from getAllSources and getConnectedDevices which
not give useful information and flood a lot.

Do not log in dumpsys addSelectSourceRequest for already
added/synced broadcasters.

Bug: 400627452
Flag: EXEMPT, log changes only
Test: atest BassClientServiceTest
Change-Id: I80a7427b882a677b86379b43caf3f95f89349a35