Settings: materialize Blacklist settings

* Add a FAB
* Add a (generic system) enable/disable switch bar

Change-Id: I0984bf6769abef48cc7e0a643c2bdd73219954fc
Signed-off-by: Roman Birg <roman@cyngn.com>
(cherry picked from commit dfdfe95f0a9f4f2e9b227dbb1eb1153f63056913)