Enable support for media-libs/dav1d AV1 decoder

Packages describing “dav1d” as local USE flag

Package “dav1d” Flag Description
media-video/vlc Enable support for media-libs/dav1d AV1 decoder
media-video/ffmpeg Enables AV1 decoding via media-libs/dav1d.
media-libs/libavif Enable support for the dav1d codec decoding

All packages providing a “dav1d” USE flag (3)