HDR static metadata support

Thanks for the library! I was experimenting with PQ-tagged output and was trying to find a way to attach HDR static metadata. I noticed that EncodedVideoPacketSource.add() accepts EncodedVideoChunkMetadata but I couldn't find a way to provide mastering display metadata or MaxCLL/MaxFALL values. Is HDR static metadata currently unsupported when writing tracks or is there another method for attaching it?