Some quick scrub fixes

> Skipping quick scrub, if its already in progress, or is waiting on previous task launch
> Restoring to proper state is the task animation is cancelled before launcher gets onStop
> Crash when using quickscrub before last list has loaded

Bug: 77289180
Bug: 77856587
Bug: 79919440
Change-Id: I8db127bf9539cfc8f47c1e86c5030637845749d4