Bug fix: QSB sometimes gets stuck to transparent.

Bug fix: QSB sometimes gets stuck to transparent.

 At some places, we were calling removeAllListeners before calling cancel
 on an animation. AnimationListeners are also used to track states, and
 removing listeners before canceling will prevent onAnimationEnd to be
 called, thus preventing state cleanup.
 PinchAnimationManager was causing ZeroAlphaAnimatorListener to be removing
 from Qsb alpha animation, making the MultiStateAlphaController think there
 is a zeroAlpha animation running.

> Removing all instances of removeAllListeners
> Updating various affected listeners to handle onAnimatinoCancel
> Fixing WorkspaceStateTransitionAnimation, which was animation QSB alpha
  on page scroll index

Bug: 31910152
Change-Id: Ie7f31b67d4c502badcdd41f7b04867d1f35f5d27