demo is sideways on Android phone

When I join a session on the demo servers with my Android phone it both renders my local video and sends my local video sideways -- 90 degrees clockwise.

Start by reproducing the issue by joining a demo-server session from an Android phone and checking both the local preview and the sent video orientation. Done means the local video renders upright and the video sent to the session is also upright.

Written by the indexing model from the issue text.