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

* commit 'a30685ef8dcaa18b2561c17cfbbb48044adb2d27':
  DO NOT MERGE SoundPool: add lock for findSample access from SoundPoolThread