Use Property Synthesis for FBFramebuffer Video Specialization
Use Property Synthesis for FBFramebuffer Video Specialization

Summary: A simple one, we can use the same slot by using `synthesize`.

Reviewed By: mattjgalloway

Differential Revision: D4494960

fbshipit-source-id: 81cbe7eae3b0b9d41e3958e6839bfb66f0b87027

facebook/FBSimulatorControl,facebook/FBSimulatorControl,facebook/FBSimulatorControl,plu/FBSimulatorControl,StevenUpForever/FBSimulatorControl,StevenUpForever/FBSimulatorControl,StevenUpForever/FBSimulatorControl,plu/FBSimulatorControl,StevenUpForever/FBSimulatorControl,facebook/FBSimulatorControl,facebook/FBSimulatorControl,plu/FBSimulatorControl,plu/FBSimulatorControl