These will be used by the interactor classes to provide data to the
ui layer.
- FilterWidgetsForHostUseCase filters widgets that don't match the
constraints specified by the host
- GroupWidgetAppsByProfileUseCase groups widgets based on their user
profile; and ensures that if work profile is paused, its widgets are
treated as empty list.
Bug: 408283627
Flag: EXEMPT independent module
Test: Unit tests
Change-Id: I676715daf5e400ba12acf50f867a5aa352d7bdf1
