[Dual Shade] Fix QuickSettingsSceneContentViewModelTest for Dual Shade.

This ensures these unit tests do not fail when Dual Shade is the default
shade experience in scene container.

Bug: 376411622
Test: Updated unit tests.
Flag: com.android.systemui.scene_container
Change-Id: I4901150a0027ccf2f574707d708472402ca79e49