Refactor touch handling out of dreams

This changelist lifts touch handling Dagger dependencies out of
dream logic so that it can be used in other contexts. The new
Ambient dagger dependencies allow the soon-to-be-renamed
DreamOverlayTouchMonitor and associated DreamTouchHandlers to
work in other environments.

Test: atest DreamOverlayTouchMonitorTest
Test: atest DreamOverlayServiceTest
Flag: NA
Bug: 333885071
Change-Id: I3d19d4c7cca3135d2ca809e4ad2e921a04d129de