DO NOT MERGE SoundPool: add lock for findSample access from SoundPoolThread am: 3d6a714980 am: 208bc477d9  -s ours
am: c56555962b

* commit 'c56555962b7e0fcee2dc0a058127f8f309f19ea8':
  DO NOT MERGE SoundPool: add lock for findSample access from SoundPoolThread