Relaunch app that is restarted mid-gesture

Bug: 156692295
Test: Swipe up from an app that has a HUN and ensure tapping on the
      HUN (or anything that can restart the activity) will start the
      activity while the recents animation is still running
Change-Id: Ia1fbd9cfb21aa64b3c8a0d431ba2d9824ee4c0a1