Undo behind scrim alpha for GH.

GH is added to the shade window frame layout before the scrim views, the scrim views appear on top of GH UI instead of behind it.

Bug: NA
Flag: com.android.systemui.notification_shade_blur
Test: verified manually.
Change-Id: I8bacf00aee31f0e98216b48d4f4c9cf7a20b9238