Merge "Add error code for BluetoothDevice#getBatteryLevel to represent Bluetooth is off" am: 1bb18d83eb am: 4e85f7bb92 am: 20f320904f am: 0d41812045 am: 51c4b0d080

Change-Id: Ib454645dcd6479c34aee453a66d176763aed5208