am cad66197: camera-metadata: clarify the AE precapture trigger API spec

* commit 'cad6619726fc322e9f0a2c958cd5e5cac319a795':
  camera-metadata: clarify the AE precapture trigger API spec
tree: c949d6e1d384b16192bb3f897e6f125409faa134
  1. audio_effects/
  2. audio_route/
  3. audio_utils/
  4. camera/
  5. private/
  6. CleanSpec.mk