fix(deps): update dependency com.android.tools.build:gradle to v8.6.0

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
com.android.tools.build:gradle (source)	8.5.2 -> 8.6.0

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Configuration

📅 Schedule: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined).

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

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• [ ] If you want to rebase/retry this PR, check this box

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This PR was generated by Mend Renovate. View the repository job log.

[renovate[bot]]

⚠️ Artifact update problem

Renovate failed to update an artifact related to this branch. You probably do not want to merge this PR as-is.

♻ Renovate will retry this branch, including artifacts, only when one of the following happens:

• any of the package files in this branch needs updating, or
• the branch becomes conflicted, or
• you click the rebase/retry checkbox if found above, or
• you rename this PR's title to start with "rebase!" to trigger it manually

The artifact failure details are included below:

File name: library/build.gradle

Command failed: ./gradlew --console=plain --dependency-verification lenient -q --write-verification-metadata sha256,pgp dependencies

FAILURE: Build completed with 2 failures.

1: Task failed with an exception.
-----------
* Where:
Build file '/tmp/renovate/repos/github/nextcloud/android-library/sample_client/build.gradle' line: 22

* What went wrong:
A problem occurred evaluating project ':sample_client'.
> Failed to apply plugin 'com.android.internal.version-check'.
   > Using different versions of the Android Gradle plugin (8.6.0, 8.5.2) in the same build is not allowed.

* Try:
> Run with --stacktrace option to get the stack trace.
> Run with --info or --debug option to get more log output.
> Run with --scan to get full insights.
> Get more help at https://help.gradle.org.
==============================================================================

2: Task failed with an exception.
-----------
* Where:
Build file '/tmp/renovate/repos/github/nextcloud/android-library/sample_client/build.gradle' line: 22

* What went wrong:
A problem occurred evaluating project ':sample_client'.
> Failed to apply plugin 'com.android.internal.version-check'.
   > Using different versions of the Android Gradle plugin (8.6.0, 8.5.2) in the same build is not allowed.

* Try:
> Run with --stacktrace option to get the stack trace.
> Run with --info or --debug option to get more log output.
> Run with --scan to get full insights.
> Get more help at https://help.gradle.org.
==============================================================================

BUILD FAILED in 3m 15s

[github-actions[bot]]

SpotBugs

Category	Base	New
Bad practice	35	35
Correctness	34	34
Dodgy code	26	26
Internationalization	6	6
Malicious code vulnerability	49	49
Multithreaded correctness	3	3
Performance	8	8
Total	161	161

[github-actions[bot]]

SpotBugs

Category	Base	New
Bad practice	35	35
Correctness	34	34
Dodgy code	26	26
Internationalization	6	6
Malicious code vulnerability	49	49
Multithreaded correctness	3	3
Performance	8	8
Total	161	161

[codecov[bot]]

Codecov Report

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

Project coverage is 48.93%. Comparing base (e3d8609) to head (a22b36a). Report is 4 commits behind head on master.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #1530 +/- ## ============================================ + Coverage 48.90% 48.93% +0.02% - Complexity 1002 1003 +1 ============================================ Files 209 209 Lines 7866 7866 Branches 1021 1021 ============================================ + Hits 3847 3849 +2 + Misses 3461 3460 -1 + Partials 558 557 -1 ``` [see 1 file with indirect coverage changes](https://app.codecov.io/gh/nextcloud/android-library/pull/1530/indirect-changes?src=pr&el=tree-more&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=nextcloud)