[sb] Display-dependent HomeStatusBarViewModelImpl

This change moves HomeStatusBarViewModel to be @AssistedInject, and
creates the complementary factories to supply the display once the
appropriate status bar (compose or fragment) is created.

It also removes the two functions that took displayId and returned flows
in place of regular-old-flows

Test: CollapsedStatusBarFragmentTest
Test: HomeStatusBarViewModelImplTest
Test: manual
Bug: 364360986
Flag: EXEMPT small refactor
Change-Id: Iebaadcc0a3596900a97d73e3fc30efb47c8f78fe