Needed to prevent VR games from crashing when the user attempts to capture the desktop.
The reference count seems to start at 0, which I've never encountered before. Not sure if my code is incorrect.
-- v2: graphicscapture: Partially implement IGraphicsCaptureSessionStatics::IsSupported(). graphicscapture/tests: Add IGraphicsCaptureSessionStatics::IsSupported() tests. graphicscapture: Add IGraphicsCaptureSessionStatics stub interface. graphicscapture: Add stub DLL. include: Add windows.graphics.capture.idl file.