Remove extra parent mode from array, and make PhotoModule scope string public

When pruning modes, we neglected to remove one of the 'photo' parent modes.
This still worked because the last two entries were both 'photo'. Also,
making PhotoModule scope string public so it can be referred to by
other modules, to accomplish the same parent function as the array.

Bug: 17103121
Change-Id: I574e9a7c2db8bf2c86d810c930fbf510d5aa1a24
2 files changed