fix: Crash on typing after sending mention (WPB-14897)

[borichellow]

WPB-14897 [Android] Crash on typing after sending mention

What's new in this PR?

Issues

STR:

• open group conv
• send message with mention
• start typing a new message
  Result: crash

Causes (Optional)

After sending a message selectedMentions field in MessageComposition state is not cleared and when user start typing a new message app tries to apply old mention to the new message

Solutions

clear selectedMentions after message send

[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

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 45.70%. Comparing base (31e4f00) to head (7bf384b).
Report is 42 commits behind head on develop.

Additional details and impacted files

@@           Coverage Diff            @@
##           develop    #3719   +/-   ##
========================================
  Coverage    45.69%   45.70%           
========================================
  Files          473      473           
  Lines        16051    16052    +1     
  Branches      2713     2713           
========================================
+ Hits          7335     7336    +1     
  Misses        7955     7955           
  Partials       761      761           

Files with missing lines	Coverage Δ
.../messagecomposer/state/MessageCompositionHolder.kt	28.82% <100.00%> (+0.42%)	⬆️

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[github-actions]

Built wire-android-staging-compat-pr-3719.apk is available for download

[github-actions]

Built wire-android-dev-debug-pr-3719.apk is available for download