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
Test2: in 0 button mode, open Maps, start directions, swipe up to
home and ensure PiP starts

Fixes: 185588376
Change-Id: I03c18b14b4f55f1f09ce3bc442de23c94aa170bf