After 9118c9b the surface can be destroy after the window state become
invisible, since WallpaperService copy the surface from WMS and it is
not implement with ViewRootImpl, WallpaperService#Engine should call
relayout to get new surface when client need to redraw it.
Bug: 158955956
Test: verify the wallpaper can show by launch LiveWallpaperChange with
live wallpaper and push/pull it from recents several times.
Test: atest WallpaperServiceTest ImageWallpaperTest
Change-Id: I79f97df61696eea325183e9b9057cbb10ce8cc66
5cac2a0279