Bluetooth: Update the PLAYSTATUS and METADATA to remote device based on
           Actual state of Music App.

Registered for PLAYSTATUS_CHANGED intent which is provided by Music App
and based this information BluetoothA2dpService is  updating the Play
status and metadata to Remote device.

Change-Id: I5fe865fcdde3e0fd2442d0629e465711696d977a
CRs-fixed: 443134
Bluetooth: Cleanup userids array to avoid null pointer exception

This fix null pointer exception during multiple gatt services.

Change-Id: I3d6061ed0a817cdfb4ab8d526c71c569edf2f929
CRs-fixed: 485789