@Override
    public Resource<byte[]> transcode(Resource<GifDrawable> toTranscode) {
        GifDrawable gifData = toTranscode.get();
        return new BytesResource(gifData.getData());
    }
An {@link ResourceTranscoder} that converts
{@link GifDrawable} into bytes by obtaining the original bytes of the GIF from
the {@link GifDrawable}.
core/src/main/java/com/bumptech/glide/load/resource/transcode/GifDrawableBytesTranscoder.java