fix: No audio/video when in MLS call (WPB-6984)

[alexandreferris]

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PR Submission Checklist for internal contributors

• The PR Title

  • conforms to the style of semantic commits messages¹ supported in Wire's Github Workflow²
  • contains a reference JIRA issue number like SQPIT-764
  • answers the question: If merged, this PR will: ... ³

• The PR Description

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What's new in this PR?

Issues

When in MLS call we would still call wcall_set_clients_for_conv

Causes (Optional)

wcall_set_clients_for_conv should be called only when conversation is Proteus

Solutions

Wrap calling of wcall_set_clients_for_conv only when conversation protocol is Proteus

Testing

How to Test

• Have 2 accounts with E2EI + MLS enabled
• Have a group with both accounts
• Start a call
• Accept/Join call from another user
• Enable mic/video and everything should be working as expected.

[github-actions]

Test Results

2 809 tests   2 783 ✔️  4m 46s ⏱️
       7 suites       26 💤
       7 files           0 ❌

Results for commit fe8f791.

♻️ This comment has been updated with latest results.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

❗ No coverage uploaded for pull request base (release/candidate@010fbfd). Click here to learn what that means.

Additional details and impacted files

@@                 Coverage Diff                  @@
##             release/candidate    #2583   +/-   ##
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  Coverage                     ?   58.28%           
  Complexity                   ?        7           
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  Files                        ?     1175           
  Lines                        ?    45851           
  Branches                     ?     4339           
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  Hits                         ?    26723           
  Misses                       ?    17184           
  Partials                     ?     1944           

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[datadog-wireapp]

Datadog Report

All test runs f3d568b 🔗

✅ 2 Total Test Services: 0 Failed, 2 Passed

Test Services

Service Name	Failed	Known Flaky	New Flaky	Passed	Skipped	Wall Time	Test Service View
kalium-ios	0	0	0	2699	129	8m 0.1s	Link
kalium-jvm	0	0	0	2821	123	8m 47.05s	Link

[vitorhugods]

Tests, please?

[vitorhugods]

I just realised that CallManagerImpl is not testable at the moment.

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