audio: fix undo of commit 149e8e5c

- commit 71882bc4 accidentally
  undid commit 149e8e5c

Change-Id: Ie1165a4d856be3b2b07d7724e2c8284b1c92aca0

src/media/audio/portaudio/portaudiolayer.cpp

@@ -386,8 +386,13 @@ PortAudioLayer::PortAudioLayerImpl::init(PortAudioLayer& parent)
         terminate();
     }
 
-    indexRing_ = indexOut_ = indexOut_ == paNoDevice ? Pa_GetDefaultOutputDevice() : indexOut_;
-    indexIn_ = indexIn_ == paNoDevice ? Pa_GetDefaultInputDevice() : indexIn_;
+#ifdef RING_UWP
+    indexRing_ = indexOut_ = Pa_GetDefaultOutputDevice();
+    indexIn_ = Pa_GetDefaultInputDevice();
+#else
+    indexRing_ = indexOut_ = indexOut_ == paNoDevice ? Pa_GetDefaultOutputDevice() : indexOut_;
+    indexIn_ = indexIn_ == paNoDevice ? Pa_GetDefaultInputDevice() : indexIn_;
+#endif
 
     if (indexOut_ != paNoDevice) {
         if (const auto outputDeviceInfo = Pa_GetDeviceInfo(indexOut_)) {