protocol-stub: Don't query FQDN when loading module-native-protocol-tcp

protocol-stub: Don't query FQDN when loading module-native-protocol-tcp

This works around the issue that in some environments it takes 10
seconds to start PulseAudio, because the network is not responding to
our FQDN queries.

A side effect of this is that we don't register the server address in
the native protocol, so things that use the address registry don't
work. Currently this affects module-zeroconf-publish and
module-bonjour-publish. The assumption is that Tizen doesn't need
either of those.

This patch is not upstreamable. To get rid of this patch, someone
needs to fix https://bugs.freedesktop.org/show_bug.cgi?id=81802

Change-Id: I38a2e2676bd4ea3fe8c54a4c0f712fa7c3c5e115