Add test for shade moving back to main display after display removal

Checking that when shade is on an external display, and the external
display is removed, the shade moves back to the default display.

Bug: 362719719
Bug: 409015090
Test: ShadeReturnsToDefaultDisplayOnExternalDisplayRemoval
Flag: com.android.systemui.shade_window_goes_around
Change-Id: I52ffda0afc8683b22b390067d09ce46e5a2f2929
2 files changed