Merge changes from topic "caitlinshk-media-ttt-displayview" into tm-qpr-dev

* changes:
  [Media TTT] Allow swiping up to dismiss the chipbar.
  [Media TTT] Make the SwipeUpGestureHandler generic.
  [Media TTT] Re-name the status bar gesture handler to be more generic.
  [Media TTT] Use a listener pattern to notify about view removals.