Add animation for the predicted icon ring

Animation is modeled after the notification dot animation.

- This avoids the ring jumping in after swiping up to home to
  a predicted app.
- Also decreased the amount of time the icon has to fade out so
  that it shows up less during the animation.

Fixes: 360115794
Test: open predicted app from hotseat, swipe up to return home
Flag: EXEMPT bugfix
Change-Id: I59659610eb2e9f375a408d553bb4aa80947a28c4