bluez5: do NameHasOwner before using org.bluez

We should not be using org.bluez when the bluetooth service is not
running or else we might try to activate it. The activation of the
bluetooth service should be done at boot time.
2 jobs for bluez-owner-check in 3 minutes and 51 seconds (queued for 5 seconds)
latest
Status Name Job ID Coverage
  Container
passed build-container #15906224

00:01:05

 
  Build
passed build-meson #15906225

00:02:46