Make HomeStatusBarInteractor a @PerDisplaySingleton

This doesn't really change any behavior at the moment, since the
dependencies of this interactor are not display aware yet.

The only difference for now is that there will be one instance of this
interactor per display.

Bug: 435653753
Test: Build & Run SystemUI
Flag: EXEMPT Dagger change that can't be flagged
Change-Id: I16eb13bf94a5c8ece1a71a58fcec28a161a14b5c