DO NOT MERGE SoundPool: add lock for findSample access from SoundPoolThread am: 0a887bcd5c am: 7c798c13a7 am: 94cefd6adb am: a30685ef8d am: ae4b789619
am: b0545b6b1e  -s ours

* commit 'b0545b6b1ef4550b03c3de8cde1e72f9b31ee6cb':
  DO NOT MERGE SoundPool: add lock for findSample access from SoundPoolThread