Merge "Camera: Sync camera extensions stubs" into sc-dev am: bd39a02272 am: ca42a0c846

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/ex/+/14630593

Change-Id: I5e0d33ae422e540c976f934286311c5ed1f05ab9
tree: b6abcb37f32b8814a5f4aa25a459d5301e26709e
  1. camera2/
  2. common/
  3. framesequence/
  4. photoviewer/
  5. widget/
  6. CleanSpec.mk
  7. OWNERS