Bug 3352047 Wrong message when adjusting volume

Add hidden AudioManager.getDevicesForStream and output device codes.

Change-Id: I4d1c1d3b6a077cd117720817d1f733dda557b947
diff --git a/services/audioflinger/AudioPolicyService.h b/services/audioflinger/AudioPolicyService.h
index 4749b8b..faad893 100644
--- a/services/audioflinger/AudioPolicyService.h
+++ b/services/audioflinger/AudioPolicyService.h
@@ -86,6 +86,7 @@
     virtual status_t getStreamVolumeIndex(AudioSystem::stream_type stream, int *index);
 
     virtual uint32_t getStrategyForStream(AudioSystem::stream_type stream);
+    virtual uint32_t getDevicesForStream(AudioSystem::stream_type stream);
 
     virtual audio_io_handle_t getOutputForEffect(effect_descriptor_t *desc);
     virtual status_t registerEffect(effect_descriptor_t *desc,