Update modules to allow empty impls

This change sets up the ability to replace calls to
CentralSurfacesImpl.getShadeViewController by injecting a
ShadeViewController via Dagger. Now that ShadeViewController is a
singleton it can be injected in the singleton scope, removing the
need for access via CSI. However, variants without a shade cannot
inject SVC without bringing in all of NPVCs dependencies. By
temporarily adding empty implementations of the shade interfaces
and a module to inject those instead, variants will avoid picking
up many unnecessary dependencies during this cleanup work.

Bug: 288868098
Bug: 291620003
Test: updated and ran affected test
Change-Id: If7918ed932a8945d2e014ffd1a741ba93ae17580
Merged-In: If7918ed932a8945d2e014ffd1a741ba93ae17580