Producer scores for Consumers

[ibc]

Solution for #420

Make ConsumerScore include a new producerScores field:

export type ConsumerScore =
{
	/**
	 * The score of the RTP stream of the consumer.
	 */
	score: number;

	/**
	 * The score of the currently selected RTP stream of the producer.
	 */
	producerScore: number;

	/**
	 * The scores of all RTP streams in the producer.
	 */
	producerScores: number[];
}

This way, the consumer side can know what spatial layers are "alive" in the producer side.

[ibc]

Ready, merging.

[ibc]

Here is an overview of what got changed by this pull request:

Clones added
============
- worker/src/RTC/SimulcastConsumer.cpp  1
- worker/src/RTC/SvcConsumer.cpp  1
         

See the complete overview on Codacy

[jmillan]

👍