fix: empty conversation list on import media [WPB-10483] 🍒

[github-actions]

This PR was automatically cherry-picked based on the following PR:

• fix: empty conversation list on import media [WPB-10483] #3400

Original PR description:

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WPB-10483 [Android] empty conversation list when sharing image using sharing extention

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PR Submission Checklist for internal contributors

• The PR Title

  • conforms to the style of semantic commits messages¹ supported in Wire's Github Workflow²
  • contains a reference JIRA issue number like SQPIT-764
  • answers the question: If merged, this PR will: ... ³

• The PR Description

  • is free of optional paragraphs and you have filled the relevant parts to the best of your ability

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What's new in this PR?

Issues

• updating conversation list was not executed on main dispatcher
• updating same state from different observers may cause race condition

Causes (Optional)

Random empty conversation list

Solutions

• Introduce separate state for avatar asset
• update conversation list on main dispatcher

[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-commenter]

Codecov Report

Attention: Patch coverage is 0% with 6 lines in your changes missing coverage. Please review.

Project coverage is 44.48%. Comparing base (0b6296e) to head (6df5a73).
Report is 241 commits behind head on develop.

Files with missing lines	Patch %	Lines
...id/ui/sharing/ImportMediaAuthenticatedViewModel.kt	0.00%	6 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff            @@
##           develop    #3401   +/-   ##
========================================
  Coverage    44.48%   44.48%           
========================================
  Files          464      464           
  Lines        15507    15507           
  Branches      2593     2593           
========================================
  Hits          6899     6899           
  Misses        7875     7875           
  Partials       733      733           

Files with missing lines	Coverage Δ
...id/ui/sharing/ImportMediaAuthenticatedViewModel.kt	0.00% <0.00%> (ø)

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[github-actions]

Built wire-android-staging-compat-pr-3401.apk is available for download

[github-actions]

Built wire-android-dev-debug-pr-3401.apk is available for download