fix (join room) : do not navigate up when join is successful

[ganfra]

Content

Quick fix on the RoomFlow navigation, probably introduced when using the new Flow<RoomInfo> logic.

The membership is observed by the parent RoomFlowNode which take care of attaching the proper Node as a root, so no need to navigateUp in this case.

Motivation and context

Fix issue.

Screenshots / GIFs

Tests

• Step 1
• Step 2
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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

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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

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 80.30%. Comparing base (680b63d) to head (106a0bf).
Report is 17 commits behind head on develop.

Additional details and impacted files

@@           Coverage Diff            @@
##           develop    #4899   +/-   ##
========================================
  Coverage    80.30%   80.30%           
========================================
  Files         2155     2155           
  Lines        57261    57261           
  Branches      7220     7220           
========================================
  Hits         45982    45982           
  Misses        8830     8830           
  Partials      2449     2449           

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