Refactored the UserRecyclerGridView to use PagedListView from the

car support library.  This also surfaced a scrollbar.
Additionally, added a touch ripple when you touch a
user's picture and disabled the user buttons once a profile is
selected

Test: tested on Mojave
bug: 77870748, 77869522, 77870549
Change-Id: I3706f1089c7c91e8db8d9126a269fd984e2b5dc9