Highlight car nav facet when recent task changes.

CarStatusBar will now register a ITaskStackListener
to handle changes in task stack and highlight the
appropriate facet for the current task. Currently using resource
defined package names and category to the filter for a given
facet. OEMs are expected to use categories definied in Intent.java

Also refactored business logic from CarNavigationBarView
into CarNavigationBar controller.

Change-Id: I203917ea43f2f488a1167f27dab84f1c451b3e93