Fix folder icon animation where it animates downwards on 1st run.

The first time FolderIcon#growAndFadeOut is called, the folder
icon pivot x/y is not set. By moving the call after centerAboutIcon
(which sets the pivot point), we get the expected result of the
animation growing upward.

Bug: 35126799
Change-Id: I22fccb6b23550f823eb7b4485b9584022b810323