scripts: Add an intended-roles policy script

This routes streams of a given media.role to devices which specify that
role in device.intended-roles.
2 jobs for intended-roles in 2 minutes and 50 seconds
Status Name Job ID Coverage
  Container
passed container_fedora #11073235

00:02:12

 
  Build
passed build_on_fedora #11073236

00:00:38