Introduce LE audio broadcast system APIs

* Rename BluetoothLeBroadcastSourceInfo to
  BluetoothLeBroadcastReceiveState so that it matches the name in the
  Bluetooth specification
* Added callbacks to BluetoothLeBroadcast so that caller that wait
  for asynchronouze operations with reason code in the hope to reduce
  potential race conditions
* Allow multiple broadcast to be set up on the same deivce if the device
  supports it
* Added ScanFilter to searchForSources() method and removed
  selectSources() method for BluetoothLeBroadcastAssistant so that the
  Bluetooth stack can automatically handle periodic sync after a
  Broadcast source is found and only do this for a limited number of
  devices
* Added structural APIs to store Broadcast Source and Group information
* Added unknown address type in BluetoothDevice

Bug: 208222281
Test: make
Tag: #feature
Ignore-AOSP-First: Merge conflict in master
Change-Id: If4c3af658b5bc1283d76e5d1899485a487ab7626
Merged-In: If4c3af658b5bc1283d76e5d1899485a487ab7626
(cherry picked from commit 4f9d9020)