SwipeSourceDetector.source() should return SwipeSource.Resolved

It does not make sense for detectors to return a source that still has
to be resolved.

Bug: 353679003
Test: atest SwipeToSceneTest
Flag: com.android.systemui.scene_container
Change-Id: I3c369c1156807851bd0882a27741ae5ce9e44e76
5 files changed