[kmf-webrtc-loopback] WebRTC in loopback with Faceoverlay demo

Change-Id: I4e9caf4fe71b1187348d3da8ad548fcebb0f01bf
[kmf-webrtc-call] WebRTC call 1 to 1 demo

Change-Id: Ief5cbd4fc8a798fe084bbbd188459f3ba3009fb8