soundpool: update sample rate when reusing audiotrack

User might update playback rate while calling Play on a sample.
Update sample rate if reusing existing audio track.

Change-Id: I7007c335fa405baf663a322408b92b9df53efdb0
Signed-off-by: Glenn Kasten <gkasten@google.com>
diff --git a/media/jni/soundpool/SoundPool.cpp b/media/jni/soundpool/SoundPool.cpp
index 8957b3c..dfe2844 100644
--- a/media/jni/soundpool/SoundPool.cpp
+++ b/media/jni/soundpool/SoundPool.cpp
@@ -743,8 +743,10 @@
             // From now on, AudioTrack callbacks received with previous toggle value will be ignored.
             mToggle = toggle;
             mAudioTrack = newTrack;
+            ALOGV("using new track %p for sample %d", newTrack.get(), sample->sampleID());
         } else {
             newTrack = mAudioTrack;
+            newTrack->setSampleRate(sampleRate);
             ALOGV("reusing track %p for sample %d", mAudioTrack.get(), sample->sampleID());
         }
         newTrack->setVolume(leftVolume, rightVolume);