onReturnToCameraScreen

Called when the user wants to add a picture of another page. Also called when the user has deleted every page and the document consisted of images taken with the Camera Screen or imported using the Camera Screen.

If you host the MultiPageReviewFragment in its own Activity, then you should simply finish the Activity.

If you use one Activity to host all the GVL fragments, then you should display the CameraFragmentCompat (or the CameraFragmentStandard) again.