Create unified-plan.md (#190)
Create unified-plan.md (#190)

This is a copy/paste from internal document https://docs.google.com/document/d/1dw6FG71x_vIlkGeY-8ZEH23WdjcDekIsEJAbZHORh8Y/edit
webrtc/webrtc-org,webrtc/webrtc-org,webrtc/webrtc-org