chore: cleanup MLSCallHelper class (WPB-7153) - cherrypick RC

[ohassine]

WPB-7153 [Android] Add flag for customer specific 1:1 calls in federated environment

---

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

  • is free of optional paragraphs and you have filled the relevant parts to the best of your ability

---

What's new in this PR?

Issues

Cherrypick of #2938

Needs releases with:

• GitHub link to other pull request

Testing

Test Coverage (Optional)

• I have added automated test to this contribution

How to Test

Briefly describe how this change was tested and if applicable the exact steps taken to verify that it works as expected.

Notes (Optional)

Specify here any other facts that you think are important for this issue.

Attachments (Optional)

Attachments like images, videos, etc. (drag and drop in the text box)

---

PR Post Submission Checklist for internal contributors (Optional)

• Wire's Github Workflow has automatically linked the PR to a JIRA issue

---

PR Post Merge Checklist for internal contributors

• If any soft of configuration variable was introduced by this PR, it has been added to the relevant documents and the CI jobs have been updated.

---

References

1. https://sparkbox.com/foundry/semantic_commit_messages
2. https://github.com/wireapp/.github#usage
3. E.g. feat(conversation-list): Sort conversations by most emojis in the title #SQPIT-764.

[github-actions]

Test Results

3 179 tests  ±0   3 074 ✔️ ±0   3m 8s ⏱️ -14s
   544 suites ±0      105 💤 ±0 
   544 files   ±0          0 ❌ ±0 

Results for commit 6db39d1. ± Comparison against base commit 683661d.

♻️ This comment has been updated with latest results.

[datadog-wireapp]

Datadog Report

Branch report: cleanup-MLSCallHelper-class-rc
Commit report: e32d002
Test service: kalium-jvm

✅ 0 Failed, 3074 Passed, 105 Skipped, 9.93s Total Time

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud