This can happen where you drag a new item to a Folder that has
a full first page.
Bug: 36022385
Bug: 35064148
Change-Id: I092a79a13b7f779f09ee7a79488a16fe8bfbc2fd
Added FolderAnimationManager, which manages the opening
and closing animations.
All of the animations are done in the Folder.
ie. When the users taps on the FolderIcon, we immediately hide the
FolderIcon and show the Folder inits place before starting the animation.
Bug: 35064148
Change-Id: Icacdbbf78a25489f2eab4fd352f2c6ed71eb710b
Jon Miranda