Add enterDesktopWithDrag scenario.

Implement
- EnterDesktopWithDrag scenario
- EnterDesktopWithDragLandscape FaaS test
- DesktopModeUtils

Test: atest EnterDesktopWithDragLandscape
Bug: 316318390
Change-Id: I76d73764ca68147c53efafce1b331e18481f3325
5 files changed