Simplify logic for disconnect and getConnectionStatus in MapProfile

* disconnect: remove connected device check logic. BluetoothMapService
  will check it.
* getConnectionStatus: remove connected device check logic.
  BluetoothMapService will check it.
* Rewrite the annotation about this class.
* Remove member variable V and related checks.
* wrap if/else statement in curly brackets.

Bug: 111812003
Test: manual - disconnect MAP from Settings UI
Change-Id: I2469821f0ae2e3f384844326b30c7d3c4c88ab63
1 file changed