We're only looking for modems with voice capabilities. Warning that
there are no modems available at all might be confusing to the person
trying to track down a problem.
This makes sure we end up with the correct xdg app_id in Wayland:
before:
[943832,359] -> xdg_toplevel@27.set_app_id("calls")
after:
[1180814,499] -> xdg_toplevel@27.set_app_id("sm.puri.Calls")
Closes#8
This avoids
WARNING: Project targetting '>= 0.40.1' but tried to use feature introduced in '0.42.0': gnome.mkenums_simple
0.42 is fairly old already and 0.40 isn't in a stable Debian release
either.