WebCodecs Web Tests

• audio-encode-decode.html
• convert-to-rgb.html
• copyTo.html
• draw-image.html
• encode-color-space.html
• encode-decode.html
• encode.html
• encoding-framerate-resolutions.html
• encoding-modes.html
• encoding-rate-control.html
• frame-qp-encoding.html
• frame-size-change.html
• manual-svc.html
• mixed-source-encoding.html
• svc.html
• terminate-worker.html
• tex-image-2d.html
• webrtc-peer-connection.html