25994b4306
This is work on the transitions with wallpapers. There are now new animations specifically for leaving the wallpaper and returning to it, which allow us to have a consistent animation when entering home and returning to it. I also renamed the existing animations across wallpapers, and cleaned up some junk in the various interpolators. This also now hides the wallpaper surface when it is not visible, to get rid of the wallpaper flickers people complained about albeit in a somewhat brutal way. :) (Though really returning us to the previous behavior with the same previous bugs and name back to them not being very visible, yay!) There is are also some bug fixes here and there about managing the wallpaper visibility that this change revealed. Change-Id: I913990a9a81651728122ed2e1101b75ed2c36fcb