UploadMediaDetail: replace discreet error toast with more-noticeable dialog

[byerlyb20]

Description (required)

Fixes #4358

• Add new string resources for connection error dialog title and description
• Add new showConnectionErrorPopup() method to UploadMediaDetailContract
• Implement showConnectionErrorPopup() in UploadMediaDetailFragment to launch an alert dialog
• Call showConnectionErrorPopup() from UploadMediaPresenter when image quality verification fails with an UnknownHostException

Tests performed (required)

Tested betaDebug on Pixel 4 XL with API level 30.

Screenshots (for UI changes only)

[codecov-commenter]

Codecov Report

Merging #4433 (31b47a3) into master (7db6f83) will decrease coverage by 0.04%.
The diff coverage is 0.00%.

@@             Coverage Diff              @@
##             master    #4433      +/-   ##
============================================
- Coverage     10.34%   10.30%   -0.05%     
- Complexity      479      482       +3     
============================================
  Files           342      343       +1     
  Lines         13201    13251      +50     
  Branches       1083     1090       +7     
============================================
- Hits           1366     1365       -1     
- Misses        11766    11815      +49     
- Partials         69       71       +2     

Impacted Files	Coverage Δ
...upload/mediaDetails/UploadMediaDetailFragment.java	0.00% <0.00%> (ø)
...mons/upload/mediaDetails/UploadMediaPresenter.java	53.27% <0.00%> (-1.02%)	⬇️
...rw/commons/wikidata/WikidataDisambiguationItems.kt	50.00% <0.00%> (-50.00%)	⬇️
...ree/nrw/commons/upload/depicts/DepictsPresenter.kt	72.54% <0.00%> (-19.76%)	⬇️
...rc/main/java/fr/free/nrw/commons/db/AppDatabase.kt	0.00% <0.00%> (ø)
...c/main/java/fr/free/nrw/commons/db/Converters.java	0.00% <0.00%> (ø)
...n/java/fr/free/nrw/commons/upload/UploadModel.java	0.00% <0.00%> (ø)
.../free/nrw/commons/di/CommonsApplicationModule.java	0.00% <0.00%> (ø)
...ee/nrw/commons/upload/depicts/DepictsFragment.java	0.00% <0.00%> (ø)
...ommons/upload/structure/depictions/DepictedItem.kt	88.67% <0.00%> (ø)
... and 1 more

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 7db6f83...31b47a3. Read the comment docs.

[neslihanturan]

Thanks a lot @byerlyb20 , it is nicely written and works as intended. Additionally, congratz for your first contribution, welcome! 🥳