Fix 6046544 Deleting a photo takes multiple steps and the flow is inconsistent...

Fix 6046544 Deleting a photo takes multiple steps and the flow is inconsistent with other deleting flows on other core apps

This CL adds a confirm dialog to delete command and removes all confirm/cancel menu items from the actionbar.

b:6046544
Change-Id: I3afe7b59b4f6d1216e192a621621f7bf544e1919