Disable stack cropping for docked animating windows only.

Non docked windows should be cropped by the stack bounds when they
animate. An example of this is having both a docked activity and a full
screen activity resuming together. The full screen activity should be
cropped.

Bug: 24913915

Change-Id: I35ed71e7625f2fcdb5c51649be9f33d5773c162c