Do not call WM until we have a window token

Ensuring that we won't ask WM to set a zoom until we have a window
token, also guarding against it on WallpaperManager.

Test: atest NotificationShadeDepthControllerTest
Fixes: 177637619
Change-Id: I0c775acf3a1045fc5b1b6540d981dea92fda91d6
3 files changed