[Dual Shade] Fix ShadeModeInteractorImplTest for Dual Shade on.

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: I336afb72f9cc5d4cf6b6424788e19f64264c93ed