Block insecure connection on the WebView

[TimoPtr]

Summary

Add a new screen on top of the WebViewActivity that prevents loading the URL if we are in an insecure state and the user picked the Most secured option. This screen change based on the current state and can display banner with button to help the user 'fix' the situation.

Checklist

• [x] New or updated tests have been added to cover the changes following the testing guidelines.
• [x] The code follows the project's code style and best_practices.
• [x] The changes have been thoroughly tested, and edge cases have been considered.
• [x] Changes are backward compatible whenever feasible. Any breaking changes are documented in the changelog for users and/or in the code for developers depending on the relevance.

Screenshots

Any other notes

The screen doesn't refresh on its own.

[github-actions[bot]]

Test Results

 89 files  + 2   89 suites  +2   7m 53s ⏱️ +10s 835 tests +43  835 ✅ +43  0 💤 ±0  0 ❌ ±0  848 runs  +43  848 ✅ +43  0 💤 ±0  0 ❌ ±0 

Results for commit 2b7a5a2e. ± Comparison against base commit 4427003b.

:recycle: This comment has been updated with latest results.