Integrate new native media player stopping changes

[caprica]

https://code.videolan.org/videolan/vlc/-/commit/fe65b13db01c470b34da1c647c5e6b0b395747a9

[caprica]

Actually, this commit is not making changes to public LibVLC API, it's just internals.

It seems the LibVLC API changes will come later.

[caprica]

See #1300

[caprica]

Done in vlcj-natives.