Update Gradle to version 7.6.1 and Android Gradle Plugin to 7.4.1

[rvandermeulen]

Pull Request checklist

• Quality: This PR builds and tests run cleanly
  • Note:
    • For changes that need extra cross-platform testing, consider adding [ci full] to the PR title.
    • If this pull request includes a breaking change, consider cutting a new release after merging.
• Tests: This PR includes thorough tests or an explanation of why it does not
• Changelog: This PR includes a changelog entry in CHANGES_UNRELEASED.md or an explanation of why it does not need one
  • Any breaking changes to Swift or Kotlin binding APIs are noted explicitly
• Dependencies: This PR follows our dependency management guidelines
  • Any new dependencies are accompanied by a summary of the due dilligence applied in selecting them.

Branch builds: add [ff-android: firefox-android-branch-name] and/or [fenix: fenix-branch-name] to the PR title.

[codecov-commenter]

Codecov Report

Base: 46.24% // Head: 46.24% // No change to project coverage 👍

Coverage data is based on head (2f04663) compared to base (b3d34a8).
Patch has no changes to coverable lines.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #5401   +/-   ##
=======================================
  Coverage   46.24%   46.24%           
=======================================
  Files         172      172           
  Lines       14252    14252           
=======================================
  Hits         6591     6591           
  Misses       7661     7661           

Help us with your feedback. Take ten seconds to tell us how you rate us. Have a feature suggestion? Share it here.

☔ View full report at Codecov.
📢 Do you have feedback about the report comment? Let us know in this issue.

[rvandermeulen]

This looks good AFAICT. The only CI bustage is broken Fenix builds due to #5406. That said, I must confess that I don't claim to fully understand the implications of the JVM 11 bytecode change even if everything does appear to be green.

[jeddai]

r+wc If Fenix+Focus are updated to this version as well I don't see a problem with upgrading it.

I would request though that we add a changelog entry as a breaking change noting that the jvm compat target is now 11

[travis79]

Looks good to me, with @jeddai's request to add a changelog entry satisfied.

[rvandermeulen]

AC/Fenix/Focus bump has landed in mozilla-mobile/firefox-android#732.