The overflow menu replaces the normal options menu panel for
activities with an action bar. It always appears as the rightmost
action button and is displayed as a dropdown menu. The menu key
summons and dismisses the overflow menu instead of the options panel
where applicable.
Change-Id: I0b4fa7e36f35ab12e2f0c1d12bec79ccab8cc4b1
8028dd32a4