Integrate MMSD with mobile-broadband-provider-info
At the moment, the MMSC is specified at compile time vis the simple.c plugin. It would be nice to specify the MMSD in coordination with mobile-broadband-provider-info , and provide a way to set the MMSC after compile time manually if it is not in mobile-broadband-provider-info.
https://gitlab.gnome.org/GNOME/mobile-broadband-provider-info