[webrtc-stats] Stats for Audio network adaptation

ivocreusen has just created a new issue for https://github.com/w3c/webrtc-stats:

== Stats for Audio network adaptation ==
We are currently working on adding several statistics related to Audio Network Adaptation to the non-standard GetStats interface in WebRTC. Our current proposal is to add stats to track several things:
- A counter for the number of times the audio bitrate is changed since the start of the call.
- A counter for the number of times DTX is toggled.
- A counter for the number of times FEC is toggled.
- A counter for the number of times the number of audio channels is changed.
- A counter for the number of times the frame length is increased.
- A counter for the number of times the frame length is decreased.
- The uplink packet loss fraction as determined by the FEC controller.
I think these stats are pretty general and not very implementation specific, so would it be a good idea to standardise these?

Please view or discuss this issue at https://github.com/w3c/webrtc-stats/issues/240 using your GitHub account