A2DP: Add more messages when doing bluetooth_manager dump

* Overall State:
  1. Codecs Priority
  2. Codecs Offloading Preference
* Specified Device (StateMachine)
  1. Flags about its connection state
  2. Its Optional codec state
  3. Selectable codecs list

Bug: 147722540
Test: manually
Change-Id: I9cd08803d3eac9940e80e5edc89becf148e4dd70