Cleaning up some animation states:

> When running one-off animations during quickstep, cancelling prevoisly
  running animations.
> Cancelling such one-off animations when state is reset
> Preventing touch proxied from recent transition to affect quickswitch
  (by affecting pagedView)

Bug: 135686388
Bug: 135571566
Change-Id: Id647015a583761d8fd46a02e3e2d88027e282a79