[Feature request]: Polling Bandwith Estimation

[geoffviola]

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Describe the feature

I see that there are two APIs rtcPeerConnectionGetMetrics and peerConnectionOnSenderBandwidthEstimation. rtcPeerConnectionGetMetrics is synchronous and peerConnectionOnSenderBandwidthEstimation is asynchronous. Is it possible to get all the bandwidth estimation out of rtcPeerConnectionGetMetrics. I'm not sure if RTC_STATS_TYPE_TRANSPORT would be helpful, but it isn't implemented.

Use Case

It would be nice to use only rtcPeerConnectionGetMetrics instead of a mix of both synchronous and asynchronous calls.

Proposed Solution

Have all data available via a synchronous call like rtcPeerConnectionGetMetrics.

Other Information

No response