Auto connection/disconnection related changes

Remove ACTION_CONNECT_OTHER_PROFILES as it is no longer used
Allow only PRIORITY_ON and PRIORTY_OFF  as priority params for SetPriority()
API in BluetoothA2DP and BluetoothHeadset
BluetoothPBAP: Pass on proxy object as part of Service Connected callback

Change-Id: Ida00fc2b7d1dcb91b01f7ddd2cea482367a3b334