Fix connection state broadcasts

- HFP was flipping states in case of timeout
- A2DP was not sending a disconnect when the native changed its mind
  about which device was actually connected

Change-Id: Ic89292fe0d6730b8bbbc4746f8e5afabcd59a943
(cherry picked from commit e5d025a4e7b40379f576be3f8d73d98bce1c89c5)