flatpak: Fix test
Dosbox got renamed and it was our test app id, use scr2ppm instead because it also has the rename business dosbox used to have.
(cherry picked from commit bb38e7d4)
Dosbox got renamed and it was our test app id, use scr2ppm instead because it also has the rename business dosbox used to have.
(cherry picked from commit bb38e7d4)