Don't activate dleyna-renderer-service on start up

Currently, Photos activates dleyna-renderer-service on start up, which
leaves some ports open. While it's not necessary unless users wants to
display photos in a Dleyna Media Renderer. Besides, this also causes
dleyna-renderer-service activated when users use GNOME Shell search
providers.

Fix that by activating dleyna-renderer-service only when users try to
display photos in DMRs on the local area network.

GNOME/gnome-photos#75
3 jobs for wip/jonathankang/on-demand-dleyna-activation in 17 minutes and 47 seconds (queued for 3 seconds)
latest
Status Job ID Name Coverage
  Test
passed #126836
flatpak

00:17:19

 
  Review
passed #126837
review

00:00:27

manual #126838
allowed to fail manual
stop_review