Mark CarAppContextManager as @hide. am: 724d95ba5f
am: 60e2ab3c8e

* commit '60e2ab3c8e7d200d6f25b8359a910c1ecba7d4bd':
  Mark CarAppContextManager as @hide.

Change-Id: I7fd4ce1ada5bb743cc31993e2e650db350de02f4