Create an empty ShadeViewController implementation

Variants that have no shade can bind this new empty implementation
to avoid bringing in all of the dependencies of NPVC. This is not
an ideal fix to the problem, but it's a good intermediate step as
the dagger graph gets cleaned up to eliminate the need to bind it
at all.

Bug: 288868098
Test: Updated and ran affected tests
Change-Id: I88154864d008dd55d361d80a3bc7d751cbb8d365