Open QSReset dialog in the shade display

The dialog was using the wrong context to open the dialog, resulting it to be always on the default display.

Bug: 362719719
Bug: 383294128
Test: launch the dialog while the shade is in an external display
Flag: com.android.systemui.shade_window_goes_around
Change-Id: I11965761fa10878f0ed5d7540c8111af107344f5