Add screen sharing configuration information.
Add screen sharing configuration information.

strukturag/spreed-webrtc,shelsonjava/spreed-webrtc,strukturag/spreed-webrtc,shelsonjava/spreed-webrtc,shelsonjava/spreed-webrtc,shelsonjava/spreed-webrtc,shelsonjava/spreed-webrtc,gerzhan/spreed-webrtc,shelsonjava/spreed-webrtc,gerzhan/spreed-webrtc,gerzhan/spreed-webrtc,shelsonjava/spreed-webrtc,theurere/spreed-webrtc,theurere/spreed-webrtc,theurere/spreed-webrtc,strukturag/spreed-webrtc,gerzhan/spreed-webrtc,strukturag/spreed-webrtc,theurere/spreed-webrtc,gerzhan/spreed-webrtc,strukturag/spreed-webrtc,theurere/spreed-webrtc,theurere/spreed-webrtc,strukturag/spreed-webrtc,gerzhan/spreed-webrtc,gerzhan/spreed-webrtc