API to notify controls provider which surface they are shown on

Add new intent extra to ControlsProviderService which will be passed to
the panel activity to notify them which surface their activity is being
displayed on.

Bug: 311743064
Flag: ACONFIG FLAG_HOME_PANEL_DREAM DEVELOPMENT
Test: NA - just adding API
Change-Id: I3bef6699801d5cecff2868c60d7a0b3d0151c1df