frameworks/base: Fix for LPA volume change with headset

- LPA volume is set without checking the output type
- Set LPA volume only when the output is LPA.

CRs-Fixed: 373975
Change-Id: I471646bd0d1152e9768544d2db8e47293bbf147a

services/audioflinger/AudioFlinger.cpp

@@ -896,7 +896,8 @@ status_t AudioFlinger::setStreamVolume(int stream, float value, int output)
     AutoMutex lock(mLock);
 
     if( (mLPAOutput != NULL) &&
-        (mLPAStreamType == stream) ) {
+        (mLPAStreamType == stream) &&
+        (mLPAHandle == (audio_io_handle_t)output) ) {
          mLPAOutput->stream->set_volume(mLPAOutput->stream,mLPALeftVol*value,
                                           mLPARightVol*value);
          mStreamTypes[stream].volume = value;