Controls UI - Suggested controls

When no controls have been loaded, and a preferred package has been
set, bind to the preferred service and ask it for suggested controls
to seed the stored favorites.

Bug: 151817620
Test: atest StatefulControlSubscriberTest ControlsBindingControllerImplTest ControlsControllerImplTest ControlsProviderLifecycleManagerTest ServiceWrapperTest

Change-Id: I1e51b8998b8379f08c2b995b7cbe23d1037bd840