As VAAPI is a stateless interface, add a VP8 parser in order to parse
VP8 frames. The frames will be used to feed the VP8 VAAPI backend.
BUG=b:214478588
TEST=cargo test --features "video-decoder,vaapi" -p vp8
Change-Id: Ie7315a5b76cb518b09078fe72d96384965712c28
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosvm/+/3514627
Reviewed-by: Keiichi Watanabe <keiichiw@chromium.org>
Commit-Queue: Alexandre Courbot <acourbot@chromium.org>
Tested-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Alexandre Courbot <acourbot@chromium.org>
