The original bug that was solving seems to be fixed by other changes,
and this allows users to scroll, dismiss, etc on recent tasks before
fully reaching overview from an app.
Bug: 137487381
Change-Id: I28a708811bba3ce739ce261f19eb29558d8f0e7d
Currently only StatusBarTouchController overrides this to always return
false, so that you can swipe down for notifications during transition to
home screen from an app (in gesture nav).
Bug: 137161198
Change-Id: I803c37937d5294810cbe0c1bbffcd5dddcc5ca3b