as-installed tests for flatpak-xdg-utils

 flatpak-xdg-utils provides reimplementations of the standard xdg-open(1)
 and xdg-email(1) command-line tools intended to be run inside a Flatpak
 container. They use the D-Bus session bus to communicate with the
 xdg-desktop-portal service outside the container
 .
 This package contains as-installed tests, for use with autopkgtest and
 similar frameworks. They use a mock implementation of xdg-desktop-portal.