Don't use a custom animation for Notification shader in Desktop Windowing mode

Bug: 383061244
Flag: com.android.systemui.shade_app_launch_animation_skip_in_desktop
Test: atest com.android.systemui.statusbar.phone.LegacyActivityStarterInternalImplTest com.android.systemui.animation.ActivityTransitionAnimatorTest com.android.systemui.statusbar.phone.StatusBarNotificationActivityStarterTest

Change-Id: I466569bdd0c817e1617bb1e3334caa0b1b33cb23