Use member display names in membership timeline item text

[jmartinesp]

Type of change

• Feature
• Bugfix
• Technical
• Other :

Content

• Add the affected user's display name to the membership change contents.
• Use the display name in the timeline event text instead of the user id.

Motivation and context

Fixes #2866 .

Screenshots / GIFs

Before	After

Tests

• Go into a room and invite / kick / ban, etc. some user.
• Check on both sides the member's display name is always used.

Tested devices

• Physical
• Emulator
• OS version(s): 14

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 includes a new file under ./changelog.d. See https://github.com/element-hq/element-x-android/blob/develop/CONTRIBUTING.md#changelog
• 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

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
No data about Coverage
No data about Duplication

See analysis details on SonarCloud

[github-actions]

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 74.30%. Comparing base (5d8cc80) to head (d7e5eba).
Report is 2 commits behind head on develop.

Additional details and impacted files

@@           Coverage Diff            @@
##           develop    #2883   +/-   ##
========================================
  Coverage    74.30%   74.30%           
========================================
  Files         1530     1530           
  Lines        36524    36526    +2     
  Branches      7054     7055    +1     
========================================
+ Hits         27140    27142    +2     
  Misses        5698     5698           
  Partials      3686     3686           

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