AudioRecord::stop() return void

like AudioTrack::stop()

Change-Id: Iab62f4665151345f1ad5874c97a21d1a331f0154
diff --git a/include/media/AudioRecord.h b/include/media/AudioRecord.h
index f7ebd39..7e66ac9 100644
--- a/include/media/AudioRecord.h
+++ b/include/media/AudioRecord.h
@@ -201,7 +201,7 @@
      * obtainBuffer returns STOPPED. Note that obtainBuffer() still works
      * and will fill up buffers until the pool is exhausted.
      */
-            status_t    stop();
+            void        stop();
             bool        stopped() const;
 
     /* get sample rate for this record track
diff --git a/media/libmedia/AudioRecord.cpp b/media/libmedia/AudioRecord.cpp
index 807f812..9d5813b 100644
--- a/media/libmedia/AudioRecord.cpp
+++ b/media/libmedia/AudioRecord.cpp
@@ -324,7 +324,7 @@
     return ret;
 }
 
-status_t AudioRecord::stop()
+void AudioRecord::stop()
 {
     sp<AudioRecordThread> t = mAudioRecordThread;
 
@@ -345,8 +345,6 @@
             set_sched_policy(0, mPreviousSchedulingGroup);
         }
     }
-
-    return NO_ERROR;
 }
 
 bool AudioRecord::stopped() const