Hide QS shade when triggering ExtraDim migration dialog

The shade obscures a toast that is triggered by the dialog.
Therefore, dismissing the shade helps ensure the user sees this toast.

Bug: 378019073
Test: atest ExtraDimDialogManagerTest
Flag: com.android.server.display.feature.flags.even_dimmer
Change-Id: Ia11b56cec3d38393dd1ce63267e4ceb5ddc50802
2 files changed