- Added support for widgets for the new close animation.
- This anim is used with the new app close.
- This anim is not compataible with the old app close, so we need to
keep StaggeredWorkspaceAnim in case we turn the app close flag off.
- We will also use this anim in the lockscreen to launcher anim, will
connect them in a follow up CL.
Bug: 188413065
Bug: 173107751
Test: manual
Change-Id: Icab3fd700f2c268bb1c4509a37466e4e6748f789
Jon Miranda
7d2dfcfb3f