Windows/Audio: add listener for device change

For some reason XAudio2 doesn't automatically change the device anymore.
So let's just listen for the OnDefaultDeviceChanged event and update the cell audio thread if necessary.

rpcs3/Emu/Cell/Modules/cellAudio.cpp

@@ -305,7 +305,6 @@ u64 audio_ringbuffer::update()
 			//cellAudio.error("play_delta=%llu delta_samples=%llu", play_delta, delta_samples);
 			if (delta_samples > 0)
 			{
-
 				if (enqueued_samples < delta_samples)
 				{
 					enqueued_samples = 0;
@@ -618,6 +617,7 @@ void cell_audio_thread::operator()()
 	{
 		if (m_update_configuration)
 		{
+			cellAudio.warning("Updating cell_audio_thread configuration");
 			update_config();
 			m_update_configuration = false;
 		}