fix media bugs with multiple peers to same user

[HexaField]

Summary

PeerMediaChannelState made assumptions about and was determinded by an algorithm to select specific peers to be shown in the user media windows. PeerMediaChannelState should hold an entry for every peer, as logic is dependent upon it to handle consumers & producers.

Moving the assumption to the media window component itself cleans up the logic a lot, and fixes the issues.

References

closes #insert number here

Checklist

• If this PR is still a WIP, convert to a draft
• When this PR is ready, mark it as "Ready for review"
• ensure all checks pass
• Changes have been manually QA'd
• Changes reviewed by at least 2 approved reviewer

QA Steps

List any additional steps required to QA the changes of this PR, as well as any supplemental images or videos.

[barankyle]

When I tested it locally, I saw that it won't display user bubbles until they have some sort of media transmitting. Is that what we want, or do we want to keep it where it shows up in non-immersive mode no matter what?

[HexaField]

When I tested it locally, I saw that it won't display user bubbles until they have some sort of media transmitting. Is that what we want, or do we want to keep it where it shows up in non-immersive mode no matter what?

Was this for other users or just other peers? We want to show all users, but only peers if they have media, and if no peers have media, show the avatar thumbnail.