Update Gradle to 8.10.2, AGP to 8.6.1 and also update latest test configuration for the functional test

[0xnm]

What does this PR do?

This PR updates Gradle to 8.10.2, AGP to 8.6.1 and also updates latest test configuration for the functional test.

Review checklist (to be filled by reviewers)

• [ ] Feature or bugfix MUST have appropriate tests (unit, integration, e2e)
• [ ] Make sure you discussed the feature or bugfix with the maintaining team in an Issue
• [ ] Make sure each commit and the PR mention the Issue number (cf the CONTRIBUTING doc)

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 78.31%. Comparing base (a6dbcf2) to head (984ae82). Report is 4 commits behind head on develop.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## develop #292 +/- ## ============================================= + Coverage 77.88% 78.31% +0.44% - Complexity 251 252 +1 ============================================= Files 31 31 Lines 913 913 Branches 114 114 ============================================= + Hits 711 715 +4 + Misses 150 147 -3 + Partials 52 51 -1 ``` [see 4 files with indirect coverage changes](https://app.codecov.io/gh/DataDog/dd-sdk-android-gradle-plugin/pull/292/indirect-changes?src=pr&el=tree-more&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=DataDog)