Camera2: Enable Face Authentication

- Add API in HWI to register face image
- Add offline reprocess channel to register face image
- Add CAM_FORMAT_JPEG into image format, needed for offline
  reprocess as input format
- Move crop info into metadata, and hence change ZoomDone
  handling in metadata stream CB instead of in event handling

Change-Id: I99ed3efc013c85b9041f3de91099390bee09d245
19 files changed