Differentiate upgrading from one-time vs from while-in-use

Add new buttons which show if the currently granted permission is
one-time instead of the while-in-use ones. Also refactor the
ViewHandlerImpl to make adding buttons a little more scalable.

Test: atest PermissionsHostTest
Bug: 144389816
Change-Id: Ie53e983ff8dca271e755d1f0539027521a024d15