flatpak: Use apps' unique ID in debug messages

Printing out the simple ID is often insuficient to understand which app
the message is refering to, so when possible, we should always print the
unique ID.
1 job for flatpak-debug-id in 14 minutes and 52 seconds (queued for 1 second)
Status Job ID Name Coverage
  Build
passed #330837
build-gnome-software

00:14:52