Fix regression in AudioTrack::pause()

Bug: 6379646
Change-Id: I12b53bc4118499ddc73a53a981f3f56328140868
diff --git a/media/libmedia/AudioTrack.cpp b/media/libmedia/AudioTrack.cpp
index 9d338f3..5d5a312 100644
--- a/media/libmedia/AudioTrack.cpp
+++ b/media/libmedia/AudioTrack.cpp
@@ -1402,7 +1402,10 @@
             return true;
         }
     }
-    return mReceiver.processAudioBuffer(this);
+    if (!mReceiver.processAudioBuffer(this)) {
+        pause();
+    }
+    return true;
 }
 
 status_t AudioTrack::AudioTrackThread::readyToRun()