setCodecPreferences should take sequence<RTCRtpCodec>

[jan-ivar]

setCodecPreferences's WebIDL currently looks like this:

undefined setCodecPreferences(sequence<RTCRtpCodecCapability> codecs);

...but it should probably be:

undefined setCodecPreferences(sequence<RTCRtpCodec> codecs);

...based on my understanding of intent which is to allow inputs from both capabilities and parameters:

transceiver.setCodecPreferences(RTCRtpReceiver.getCapabilities("video").codecs); // RTCRtpCodecCapability
transceiver.setCodecPreferences(receiver.getParameters().codecs);                // RTCRtpCodecParameters

This seems editorial to fix still, given:


...but seems like something we should fix now to have the right extension points in the future.