Add Changelog to LaunchActivity

[TimoPtr]

Summary

This PR is based on #6734 (it would need a rebase after the base is merged). It adds the Changelog dialog in onResume of the LaunchActivity to replicate the behavior of the WebViewActivity.

Checklist

• New or updated tests have been added to cover the changes following the testing guidelines.
• The code follows the project's code style and best_practices.
• The changes have been thoroughly tested, and edge cases have been considered.
• 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

Screen_recording_20260422_161955.mp4

[github-actions]

Test Results

  230 files   - 1    237 suites   - 2   10m 1s ⏱️ +4s
1 751 tests ±0  1 750 ✅ ±0  0 💤 ±0  1 ❌ ±0 
1 815 runs   - 7  1 814 ✅  - 6  0 💤 ±0  1 ❌  - 1 

For more details on these failures, see this check.

Results for commit 31e7f7e. ± Comparison against base commit ea71a61.