Animate badges when they are added or removed

- Scale the badge and text or icon up or down, respectively.
- Only animate if the badge is visible, and don't animate when
  applying shortcut or app info.
- Animate folder badge out when folder enters accepting state.

Bug: 34838365
Bug: 32410600
Change-Id: Ie60cb1fc54fe60d72734d833040545d27660d645