camera2: Split CameraMetadata.Key into 3 key classes

- Also removes special-cased Face key generation for CTS

Bug: 15091017
Change-Id: Ic56c54c0d184e209e20de374dc8a6d79527c209f
2 files changed
tree: a22f8f387681864a17f08fde3fac197b40d50d0a
  1. audio_effects/
  2. audio_route/
  3. audio_utils/
  4. camera/
  5. private/
  6. CleanSpec.mk