fix: initials avatar use regex instead and add content description (WPB-10896)

[yamilmedina]

WPB-10896 [Android] App is crashing when user does not have an avatar

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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

Crash when user had more than one space on their name

Causes (Optional)

Not using regex for whitespace

Solutions

• Use the regex instead
• Also add content description to the initials avatar for a11y

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PR Post Submission Checklist for internal contributors (Optional)

• Wire's Github Workflow has automatically linked the PR to a JIRA issue

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PR Post Merge Checklist for internal contributors

• If any soft of configuration variable was introduced by this PR, it has been added to the relevant documents and the CI jobs have been updated.

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References

1. https://sparkbox.com/foundry/semantic_commit_messages
2. https://github.com/wireapp/.github#usage
3. E.g. feat(conversation-list): Sort conversations by most emojis in the title #SQPIT-764.

[sonarcloud]

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 2 lines in your changes missing coverage. Please review.

Project coverage is 44.67%. Comparing base (681a19c) to head (94c4e0d).
Report is 6 commits behind head on develop.

Files with missing lines	Patch %	Lines
...in/kotlin/com/wire/android/model/UserAvatarData.kt	0.00%	2 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #3433      +/-   ##
===========================================
- Coverage    44.68%   44.67%   -0.01%     
===========================================
  Files          465      465              
  Lines        15602    15603       +1     
  Branches      2627     2628       +1     
===========================================
  Hits          6971     6971              
- Misses        7880     7881       +1     
  Partials       751      751              

Files with missing lines	Coverage Δ
...in/kotlin/com/wire/android/model/UserAvatarData.kt	41.17% <0.00%> (-2.58%)	⬇️

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[github-actions]

Built wire-android-staging-compat-pr-3433.apk is available for download

[github-actions]

Built wire-android-dev-debug-pr-3433.apk is available for download