Fix nightly reports - next step

[bmarty]

Following #4235

Add some tests to fix this violation:

* What went wrong:
Execution failed for task ':app:koverVerifyStates'.
> Rule 'Check code coverage of states' violated:
    instructions covered percentage for class 'io.element.android.features.lockscreen.impl.unlock.PinUnlockState' is 79.245300, but expected minimum is 90
    instructions covered percentage for class 'io.element.android.features.securebackup.impl.root.SecureBackupRootState' is 65.625000, but expected minimum is 90
    instructions covered percentage for class 'io.element.android.libraries.mediaviewer.impl.local.player.MediaPlayerControllerState' is 0.000000, but expected minimum is 90
    instructions covered percentage for class 'io.element.android.libraries.textcomposer.components.FormattingOptionState' is 0.000000, but expected minimum is 90

See https://github.com/element-hq/element-x-android/actions/runs/13176799102/job/36777908312

[github-actions]

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[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

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 80.07%. Comparing base (5456f0e) to head (54af229).
Report is 4 commits behind head on develop.

Additional details and impacted files

@@           Coverage Diff            @@
##           develop    #4239   +/-   ##
========================================
  Coverage    80.06%   80.07%           
========================================
  Files         2048     2048           
  Lines        54356    54357    +1     
  Branches      6633     6633           
========================================
+ Hits         43520    43525    +5     
+ Misses        8556     8555    -1     
+ Partials      2280     2277    -3     

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[bmarty]

One more thing to fix and we will be green