Cleanup and add unit test for DefaultPinnedMessagesBannerFormatter

[bmarty]

Cleanup and more unit tests.

[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]

Codecov Report

Attention: Patch coverage is 95.00000% with 1 line in your changes missing coverage. Please review.

Project coverage is 82.66%. Comparing base (b62348f) to head (f7d8e12).
Report is 26 commits behind head on develop.

Files	Patch %	Lines
...ges/impl/pinned/banner/PinnedMessagesBannerView.kt	93.75%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #3307      +/-   ##
===========================================
+ Coverage    82.56%   82.66%   +0.10%     
===========================================
  Files         1675     1675              
  Lines        39204    39205       +1     
  Branches      4745     4745              
===========================================
+ Hits         32367    32408      +41     
+ Misses        5163     5123      -40     
  Partials      1674     1674              

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[github-actions]

📱 Scan the QR code below to install the build (arm64 only) for this PR.

If you can't scan the QR code you can install the build via this link: https://i.diawi.com/wFqaoi

[jmartinesp]

Thanks!