The Bluetooth thread is only necessary for starting and stopping
Bluetooth with the BlueZ backend. Bluedroid implements its multi-
threading internally.
This patch moves the Bluetooth thread into the BlueZ backend. Two
runnables implement the starting and stopping code. The methods
|StartInternal| and |StopInternal| of |BluetoothDBusService| each
create an instance of the respective runnable and send it to the
internal BT thread. The code in |BluetoothService| runs completely
on the main thread.
For the Bluedroid back end, the patch changes a number of thread
assertions.
