Enable debug logs by default in BluetoothPbapReceiver

Enabled more logs to help identify issues when Bluetooth
is started because of PBAP.

Bug: 31442739
Bug: 31457305
Test: manual - checked logcat output for (lack of) excessive logs
Change-Id: I6348fe57a8b3546a8152416a5db95b8b2226e166
(cherry picked from commit beacc3b0)