Fix left room membership change

[ganfra]

Content

Ensure the right message is used when leaving room, according to the current membership :

• when leaving room
• when cancelling knock
• when declining invite

Also add some tests to ensure the room.leave triggers the correct membership change.

Motivation and context

Fix regression from removing RoomPreview leave usage.
Because of this the message was always "Left room".

Screenshots / GIFs

No ui change.

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 24
• 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
• You've made a self review of your PR

[github-actions]

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 80.43%. Comparing base (4572419) to head (091d41b).
Report is 3 commits behind head on develop.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #4765      +/-   ##
===========================================
+ Coverage    80.40%   80.43%   +0.02%     
===========================================
  Files         2143     2143              
  Lines        56766    56769       +3     
  Branches      7119     7120       +1     
===========================================
+ Hits         45644    45660      +16     
+ Misses        8685     8672      -13     
  Partials      2437     2437              

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[bmarty]

LGTM, thanks!

[bmarty]

Maybe create a private fun to avoid all the code duplication for those 3 tests?

[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