Various quickscrub fixes

> Fixing PagedView resetting the currentPage, if scrollToPage was called before first layout
  This causes quickscrub to jump back to the current task if launcher activity was dead.
> Fixing missing callbacks in DeferredTouchConsumer causing missed quick scrub flings
> Sending the resents animation callbacks on the motion queue thread, to avoid synchronization
  issues with sysui callbacks.
> Waiting until the recents animation is received before starting the scale down animation
> Calculating the offset for quickscrub statically incase launcher activity was dead

Bug: 80214390
Change-Id: I1b7d00b7b266655a92fcd6239f25ba191655150f