a50ce9c6b0
When implementing NDK media support, it would be useful to also have JNI implementation in the same binary as NDK media compatibility is lower. As such, implement a rudimentary vtable system for gstamc-codec and gstamc-format, and allow choosing the implementation at static_init() time. Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/4115>