[native] Introduce naive useSelectFromGalleryAndUpdateUserAvatar hook
Summary:
This hook composes together the previously created image avatar-related hooks (eg useProcessSelectedMedia, useUploadProcessedMedia, etc) to
- Display system image picker to user so they can pick image
- Processes the selected image
- Uploads the processed image
- Updates the user avatar with the uploadID of the uploaded processed image
There's still work to be done in terms of displaying status/progress, handling errors (eg cleaning up temporary files), etc... but this diff gets things working "end to end." Putting it up now to unblock @ginsu's camera work.
NOTE: Reusing this hook in EditThreadAvatar for now as a placeholder to satisfy Flow/ESLint/etc. Will introduce equivalent for threads in next diff.
NOTE: Renamed useSelectAndUploadFromGallery to useSelectFromGallery after "pulling out" useProcessSelectedMedia and useUploadProcessedMedia calls. Those are now handled in the higher level useSelectFromGalleryAndUpdateUserAvatar hook (and upcoming thread avatar equivalent).
Depends on D7509
Test Plan:
Able to successfully set image avatar:
Reviewers: ashoat, ginsu
Reviewed By: ashoat
Subscribers: tomek, ginsu
Differential Revision: https://phab.comm.dev/D7510