am 8554ed50: camera2: make 3A regions null when not available

* commit '8554ed50836d1d07eb03225a244937ff28600715':
  camera2: make 3A regions null when not available
tree: 23d0603ae76945ff6a9f23b2972296f90bcc1cdf
  1. audio_effects/
  2. audio_route/
  3. audio_utils/
  4. camera/
  5. private/
  6. CleanSpec.mk