Show a warning on unencrypted media

[robintown]

It looks like this:

Closes https://github.com/vector-im/voip-internal/issues/237

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (aa8ef57) 24.71% compared to head (49a5051) 24.71%.

Additional details and impacted files

@@           Coverage Diff            @@
##           livekit    #1912   +/-   ##
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  Coverage    24.71%   24.71%           
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  Files           48       48           
  Lines         2375     2375           
  Branches       438      438           
========================================
  Hits           587      587           
  Misses        1737     1737           
  Partials        51       51           

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[daniel-abramov]

Perhaps a matter of style/preference, but I'd prefer to explicitly handle undefined instead of performing a comparison that would "convert" it into boolean.

Suggested change

	const muted = audioInfo.isMuted !== false;
	const encrypted =
	audioInfo.publication?.isEncrypted !== false &&
	videoInfo.publication?.isEncrypted !== false;
	const muted = audioInfo.isMuted ?? false;
	const encrypted =
	audioInfo.publication?.isEncrypted ?? false &&
	videoInfo.publication?.isEncrypted ?? false;