Redraw live tile in updatePageOffsets()

Also finish recents controller in RecentsView#reset() if it hasn't
been already.

Test: in 2 button mode, swipe up from overview when a live tile is
running, ensure it moves offscreen with its TaskView; after swiping
from overview to home, tap nav bar to ensure controller was finished
Fixes: 185588376

Change-Id: Ibfdea9fcfb69dbc20c51474198c7cc2f9281c705