Include dav1d in releases

Scrcpy supports AV1, but no decoder was provided in binary releases.

Include dav1d:
 - <https://www.videolan.org/projects/dav1d.html>
 - <https://code.videolan.org/videolan/dav1d>

Fixes #4744 <https://github.com/Genymobile/scrcpy/issues/4744>
PR #5644 <https://github.com/Genymobile/scrcpy/pull/5644>