flatpak: Use a custom GsApp GTypes for results

1 job from wip/hughsie/GsApp-custom in 42 minutes and 11 seconds
latest
Status Job ID Name Coverage
  Build
failed #212474
build-gnome-software

00:42:11

 
Name Stage Failure
failed
build-gnome-software Build
GsPluginFlatpak:ERROR:../plugins/flatpak/gs-self-test.c:421:gs_plugins_flatpak_app_with_runtime_func: assertion failed (gs_app_get_progress (app) == 0): (100 == 0)
1/1 gnome-software / gs-self-test-flatpak FAIL 109.68 s (killed by signal 6 SIGABRT)

OK: 0
FAIL: 1
SKIP: 0
TIMEOUT: 0

ERROR: Job failed: exit code 1