Use the up-to-date version of car navigation bar being rendered by the global RRO

Test: Manual -- Navigation bars (bottom, left, and right) are rendering and functioning as they did before these changes.
App Grid and Notifications buttons are not working on the left and right navigation bars,
but I've verified that such was true before these changes,
and so it doesn't seem to be a regression caused by them.
Bug: 142509189
Change-Id: I84c526b16aa06f144a601856d5ad0052dd9c56d5