Camera: Update the extension stub documentation

Remove any documentation deltas between the CameraX stub library
and the internal AOSP copy.
Additionally address a minor inconsistency in the return values
of the sample implementation.

Bug: 231369996
Test: Camera CTS
Change-Id: I843656e379c7f8ce44762342ad543bde2e7a0f27
14 files changed
tree: 57f0811a370694699aefdb26bcee49e91e75aaad
  1. camera2/
  2. common/
  3. framesequence/
  4. photoviewer/
  5. widget/
  6. CleanSpec.mk
  7. OWNERS