Compose : add immutability to some Reaction classes

[ganfra]

Content

Some classes related to Reaction weren't Immutable and so the composable functions weren't skippable.

Motivation and context

Screenshots / GIFs

Tests

• Step 1
• Step 2
• Step ...

Tested devices

• Physical
• Emulator
• OS version(s):

Checklist

• Changes have been tested on an Android device or Android emulator with API 23
• UI change has been tested on both light and dark themes
• Accessibility has been taken into account. See https://github.com/element-hq/element-x-android/blob/develop/CONTRIBUTING.md#accessibility
• Pull request is based on the develop branch
• Pull request title will be used in the release note, it clearly define what will change for the user
• Pull request includes screenshots or videos if containing UI changes
• Pull request includes a sign off
• You've made a self review of your PR

[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 SonarCloud

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 76.13%. Comparing base (21553d7) to head (2f0e9eb).
Report is 1 commits behind head on develop.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #3224      +/-   ##
===========================================
- Coverage    76.13%   76.13%   -0.01%     
===========================================
  Files         1645     1645              
  Lines        38816    38819       +3     
  Branches      7520     7523       +3     
===========================================
- Hits         29554    29553       -1     
+ Misses        5361     5360       -1     
- Partials      3901     3906       +5     

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[jmartinesp]

LGTM!