Display non-technical error on media gallery

[jmartinesp]

This way, we can customise the error to display (throwable.message, throwable.localizeMessage, or any other error message we want).

Content

Motivation and context

Fixes #5483

Screenshots / GIFs

Tests

• Step 1
• Step 2
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Tested devices

• Physical
• Emulator
• OS version(s):

Checklist

• Changes have been tested on an Android device or Android emulator with API 24
• 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
• You've made a self review of your PR

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[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

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[codecov]

Codecov Report

❌ Patch coverage is 57.89474% with 8 lines in your changes missing coverage. Please review.
✅ Project coverage is 81.93%. Comparing base (4c358ae) to head (6ed35b0).
⚠️ Report is 13 commits behind head on develop.

Files with missing lines	Patch %	Lines
.../mediaviewer/impl/gallery/MediaGalleryPresenter.kt	0.00%	1 Missing and 1 partial ⚠️
...aries/mediaviewer/impl/gallery/MediaGalleryView.kt	50.00%	0 Missing and 2 partials ⚠️
...es/mediaviewer/impl/viewer/MediaViewerPresenter.kt	0.00%	1 Missing and 1 partial ⚠️
...ies/mediaviewer/impl/gallery/MediaGalleryEvents.kt	0.00%	1 Missing ⚠️
...aries/mediaviewer/impl/viewer/MediaViewerEvents.kt	0.00%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #5487      +/-   ##
===========================================
- Coverage    81.93%   81.93%   -0.01%     
===========================================
  Files         2371     2371              
  Lines        67207    67215       +8     
  Branches      8112     8115       +3     
===========================================
+ Hits         55069    55071       +2     
- Misses        9163     9167       +4     
- Partials      2975     2977       +2     

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[jmartinesp]

Note this Failed to load media message comes from a fake Exception(message = "Failed to load media"). This is not localized and in a real example can expose internal state of the app.

[ganfra]

I don't think we should ever use the message exception anyway :/
We probably need some clean up on the error ui through the entire app, which might require some design/product.