Camera: Actually make camera_metadata memcopyable

- Use internal offsets instead of pointers for the entry and data
- Add test to verify memcpy works and doesn't alias data.
- Remove support for forward-compatible reserved space handling, given
  that it's unlikely to be useful

Bug: 7546079
Change-Id: I439aa27fed8d243b7a04155daf5e58fa1c4c730e
3 files changed
tree: 77d03fa8e97ba48a0ffcefa9c5a77f8a8609d730
  2. audio_effects/
  3. audio_utils/
  4. camera/