refactor(backup): visibility modifier [WPB-10575]

[vitorhugods]

WPB-10575 Cross Platform Backup: Write common backup / restore library

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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

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

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What's new in this PR?

Issues

As a library that will be consumed by other clients, we should be very careful to not expose unnecessary internals to consumers.

Solutions

Make visibility modifiers mandatory, so that we do not have accidental public entities.

Testing

N/A

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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.

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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.

[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 SonarQube Cloud

[github-actions]

Test Results

3 313 tests   3 206 ✅  5m 17s ⏱️
  566 suites    107 💤
  566 files        0 ❌

Results for commit 7b682b5.

♻️ This comment has been updated with latest results.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Please upload report for BASE (epic/multiplatform-backup@f16d679). Learn more about missing BASE report.

Additional details and impacted files

@@                     Coverage Diff                      @@
##             epic/multiplatform-backup    #3153   +/-   ##
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  Coverage                             ?   54.03%           
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  Files                                ?     1246           
  Lines                                ?    36152           
  Branches                             ?     3656           
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  Hits                                 ?    19534           
  Misses                               ?    15207           
  Partials                             ?     1411           

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[datadog-wireapp]

Datadog Report

Branch report: backup/refactor/visibility-modifier
Commit report: eabd3ac
Test service: kalium-jvm

✅ 0 Failed, 3206 Passed, 107 Skipped, 41.33s Total Time