flatpak: sync openh264 metadata of the runtime
Related to #680 (closed)
Followup to 19a8b2dd
Part-of: !2167 (merged)
(cherry picked from commit f480a83b)
Related to #680 (closed)
Followup to 19a8b2dd
Part-of: !2167 (merged)
(cherry picked from commit f480a83b)