Register the status bar CarFacetButtons with their controller when the system bars are reset

This also adds multi-display support for the "selected facet" functionality

Bug:120955348
Test: Manual
Change-Id: Ide123746a5f10731174ba1ac8e71b88e173298fc
(cherry picked from commit de167bd48b52d2cb138b6f0b0168dcb749a58068)