Remove expand and expandToQs from ShadeViewController

The only expand caller outside the legacy shade package can call
the ShadeController equivalent, which means it doesn't need to be
part of the interface. expandToQs is only called inside the shade
package in legacy code that directly reference NPVC instead of SVC.

Flag: ACONFIG com.android.systemui.scene_container DEVELOPMENT
Test: Updated and ran affected test
Bug: 303267342
Change-Id: I0ca2fe55c3f0d9fb12326b84c5d87b3de874df62