Re: [webrtc-pc] Invalidate [[LastReturnedParameters]] in RTCRtpSender.setParameters

I think you need to update
```
If sender's [[LastReturnedParameters]] internal slot is empty, meaning getParameters has never been called, return a promise rejected with a newly created InvalidStateError.
```
too. It might now have been called before even when this is set to null. 

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Received on Wednesday, 2 May 2018 15:23:43 UTC