Send TURN_HOT message to the state machine from BluetoothService after it starts

All the messages sent to the StateMachine were ignored before the StateMachine
starts. To avoid TURN_HOT message from being ignored, move it out to BluetoothService
to send to the BluetoothAdapterStateMachine after the state machine starts
bug 5333923

Change-Id: I14ccd6dd7e6430aad2bca9230d01578b5327cc3f