Merge changes Ia1574315,I40af88db,I1a3dc7d4,I5fa11c21,Ia6130c1c, ... into main

* changes:
  Bass: Refactor to simplify structure and reduce nesting
  Bass: Prevent add/resume source from interruption by start/stop searching
  Bass: Add getters for broadcast ID/publicData/Name from scan record
  Bass: Remove mPendingSourcesToAdd when remote is disconnected
  Bass: Remain sync if sink is waiting for PAST
  Bass: Add PENDING_SYNC_HANDLE to give clear information what it is
  Bass: Refactor handling select source requests
  Bass: Use source ID from sink instead of provided data in modify source
  Bass: Remove sink broadcast metadata in source switch during suspend
  Bass: Remove sink broadcast metadata in remove source after disconnect
  Bass: Remove sink broadcast metadata in sink disconnection
  Bass: Unit test for remove sink broadcast metadata in remove source