[Android] Migrate Android build to declarative Gradle plugin and add pluginVersion

[gonzalogauto]

When trying to build my app with Flutter 3.32.0 I see the following error message:

A problem occurred configuring project ':adjust_sdk'.
> Parameter specified as non-null is null: method com.flutter.gradle.VersionUtils.mostRecentSemanticVersion, parameter version1

This is because the package is using the old "imperative apply of Flutter's Gradle plugins" and needs to migrate to declarative Gradle plugin format. Plus the plugin version variable is not set so the flutter tool can't read it.

For more info see this article

Flutter SDK version

Flutter 3.32.0 • channel stable • https://github.com/flutter/flutter.git
Framework • revision be698c48a6 (8 days ago) • 2025-05-19 12:59:14 -0700
Engine • revision 1881800949 (8 days ago) • 2025-05-19 10:54:07 -0700
Tools • Dart 3.8.0 • DevTools 2.45.1

Flutter Doctor

[✓] Flutter (Channel stable, 3.32.0, on macOS 15.4.1 24E263 darwin-arm64, locale en-AR)
[✓] Android toolchain - develop for Android devices (Android SDK version 35.0.0)
[✓] Xcode - develop for iOS and macOS (Xcode 16.3)
[✓] Chrome - develop for the web
[✓] Android Studio (version 2023.2)
[✓] VS Code (version 1.100.0)
[✓] Connected device (5 available)
[✓] Network resources