Add interactors for KeyEvents

This is in preparation to swap over
to using the KeyEventInteractor instead of
calling methods on CentralSurfaces. However, this is NOT and ideal
way for the interactors themselves to be structured. In the future
the interactors should be updated to reflect true modern
architecture patterns.

The logic in these interactors match logic from
NotificationShadeWindowViewController and CentralSurfacesImpl.

Test: atest KeyEventInteractorTest
Test: atest KeyguardKeyEventInteractorTest
Bug: 295927655
Change-Id: Id5c5659a4a19a0b0feb45d6ee391930c2063a9b1