Make photo selection handler available and pass photo URI on rotation

The root cause is that if we rotate screen before photo is taken/picked from
album, mPhotoSelectionHandler will be null after rotation. In addition, we
also need to restore photo URI after rotation to avoid opening Photos app
with a null URI.

Bug: 25895614

Change-Id: I625af9932a2c7f7b6c4531cc2e52973ff6c5efc7