We pipe the component name of the currently active dream into the overlay service, and when the active dream is lowlight, we hide the status bar. Test: atest DreamOverlayStateControllerTest Test: atest DreamOverlayStatusBarViewControllerTest Test: manually on device by entering/exiting low light and ensuring the status bar is hidden Fixes: 245386662 Change-Id: I22973538bea19ef108360a319c70c878cfd81800