Element Call: display error dialog only when loading the main URL

[jmartinesp]

Content

Only propagate 'webview errors' to display the error dialog when the errors happen while trying to load the webview's main URL. At the moment this happened when trying to load any asset or external URL too.

Motivation and context

Fix #3896.

Note this may not work properly on URL redirections, although I hope a redirection means the webview's URL has changed and the check is still valid. In any case, it would be a rare corner case.

Tests

• Open an Element Call external URL.
• If it load properly, it's fixed.

Tested devices

• Physical
• Emulator
• OS version(s): 14

Checklist

• Changes have been tested on an Android device or Android emulator with API 23
• 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
• Pull request includes a sign off
• You've made a self review of your PR

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[codecov]

Codecov Report

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

Project coverage is 83.06%. Comparing base (5610b19) to head (76f16e1).
Report is 1 commits behind head on develop.

Files with missing lines	Patch %	Lines
...call/impl/utils/WebViewWidgetMessageInterceptor.kt	0.00%	6 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #3962      +/-   ##
===========================================
- Coverage    83.07%   83.06%   -0.01%     
===========================================
  Files         1791     1791              
  Lines        45348    45351       +3     
  Branches      5350     5353       +3     
===========================================
  Hits         37673    37673              
- Misses        5799     5802       +3     
  Partials      1876     1876              

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[bmarty]

OK for the change, but we should probably give more info in the onError lambda and let the presenter decide what to do.

Also there is another call to onError in onReceivedSslError, maybe also protect this call hence I do not think it is necessary to fix the issue.

[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 SonarQube Cloud