Bluetooth: Avoid deadlock in aquiring bluetooth service in rare scenarios

While doing quick BT On/Off, at times both On/Off seuence trying
to get the access to bluetoothservice object leading to this issue,
In other case while trying to update the SDP records, if event loop
get the response from the controller very fast or with some reason
thread stuck in updating SDP records this issue is observed.
Removed the syncronization for updating the uuid info to resolve
this issue.

Change-Id: I5e705702c79403870ad201c88740883ece415cef
CRs-fixed: 452659
Bluetooth: Move to proper A2dp state at BT OFF.

When BT is turned OFF, A2dp might get stuck in
DISCONNECTING state. The patch ensures that A2dp state
is properly moved to DISCONNECTED.

Change-Id: I0038732542ad3d5b7b33b9536b2ec9a470919d4b