This adds new subpackages for phosh, plasma, and a new dependency on the
phone device package for wys (in Alpine Linux)

This adds subpackages for pulseaudio, phosh, and plasma mobile, and
includes some configuration files from upstream Purism for udev and
pulseaudio that help with audio a bit (though phone audio routing is
still weird/broken for now..)

The separate subpackages for phosh and plasma are necessary becuase they
each use a different modem handling daemon (modem manager and ofono,
respectively).