Merge changes from topic "testing"

* changes:
  Split MessageQueueBase out of MessageQueue to allow for an AIDL version
  Rename MessageQueue.h to retain history for next commit
tree: 9f5c675f8e7da2c7b05af152b6e2a119501df417
  1. benchmarks/
  2. include/
  3. tests/
  4. Android.bp
  5. EventFlag.cpp
  6. FmqInternal.cpp
  7. OWNERS
  8. PREUPLOAD.cfg
  9. TEST_MAPPING