Mark volume fields private

Change-Id: I8ffca0460195263d159aa13015c246122d8556a2
diff --git a/services/audioflinger/AudioFlinger.h b/services/audioflinger/AudioFlinger.h
index 49e2b2c..55c2b8c 100644
--- a/services/audioflinger/AudioFlinger.h
+++ b/services/audioflinger/AudioFlinger.h
@@ -1326,11 +1326,11 @@
         virtual     void        threadLoop_mix();
         virtual     void        threadLoop_sleepTime();
 
+    private:
         // volumes last sent to audio HAL with stream->set_volume()
         float mLeftVolFloat;
         float mRightVolFloat;
 
-private:
         // prepareTracks_l() tells threadLoop_mix() the name of the single active track
         sp<Track>               mActiveTrack;
     public: