media-session: recheck route status when != available

Save the new state so we can detect changes
Check for available != yes to also recheck when the state becomes
unknown.
4 jobs for master in 2 minutes and 7 seconds (queued for 3 seconds)
Status Name Job ID Coverage
  Container
passed container_fedora #6981991

00:00:14

 
  Build
passed build_on_fedora #6981992

00:00:36

 
  Pages
passed pages #6981993

00:01:16

 
  Deploy
passed pages:deploy

00:00:03