Add group_ids to RTCStatsMemberInterface.
Add group_ids to RTCStatsMemberInterface.

Bug: chromium:943076
Change-Id: I1bd40cbbd121dbc3c961650926d9a28fe90f6883
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/128769
Commit-Queue: Jakob Ivarsson‎ <9ca81c2aa4aa86256fc426d7d57eed586c9fd3ac@webrtc.org>
Reviewed-by: Henrik Boström <106ab6647ddadbf38d6259e9d5ec4de77fa52c00@webrtc.org>
Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#27235}
TimothyGu/libilbc,TimothyGu/libilbc,ShiftMediaProject/libilbc,TimothyGu/libilbc,TimothyGu/libilbc,TimothyGu/libilbc,ShiftMediaProject/libilbc,ShiftMediaProject/libilbc,ShiftMediaProject/libilbc,ShiftMediaProject/libilbc