Use network-available property for connection status

Callback is less often called than network-changed.
3 jobs for network in 2 minutes and 54 seconds (queued for 1 second)
latest
Status Job ID Name Coverage
  Test
passed #14020
run-appdata

00:00:08

passed #14019
run-tests

00:02:34

 
  Build
passed #14021
run-build

00:00:11