am ef073f40: Use PrioritizedSerialExecutor instead of ReentrantReadWriteLock.

* commit 'ef073f402407b19f5be90ddf68beb874945e82be':
  Use PrioritizedSerialExecutor instead of ReentrantReadWriteLock.
tree: e9c0f9b36161aef4479a24052fe17fb40c46d76f
  1. dictionaries/
  2. java/
  3. native/
  4. tests/
  5. tools/
  6. Android.mk
  7. CleanSpec.mk