Merge "Revert "Set overlayable for CarsystemUI NavBar"" into rvc-dev am: 7315e30e am: 9bc82c1a am: a8261bfe am: eefd62b2

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/11886963

Change-Id: I26269b6440cf80c8ec0e16d77c8e6323dac5b593