Merge "Update BluetoothPbap class description to indicate how to create an...

Merge "Update BluetoothPbap class description to indicate how to create an instance of the class, add intdef to return value of BluetoothPbap#getConnectionState, and move all SystemApis to require the BLUETOOTH_PRIVILEGED permission" am: cc89e592

Change-Id: I96de10ac130e3737911c050e0a76e30602c85721