Autohide local nav bar when displaying remote video

Change-Id: I693bbc9c5fa9508496b924939a4b97c71512f846
Filter out all ICE candidates except relay

Workaround some of the STUN/TURN problems with the MITRE pilot install.

Change-Id: I733e20df5d1b0a01c1eea4dbebb1202565963b21