Use libdbus instead of GIO to listen for notifications
This fixes the Error calling StartServiceByName for org.gtk.vfs.Daemon
message and subsequent crash if both the Receive Notifications plugin and Send Notifications plugin where enabled and we received a notification.
Most of the code comes from the SailfishConnect implementation here: https://github.com/R1tschY/harbour-sailfishconnect/blob/master/plugins/sf_sendnotifications/notificationslistener.cpp
Edited by Albert Vaca Cintora