Upgrade Android ecosystem and dependencies to android 11+

[Copilot]

The Android build scripts were using AGP 4.2.0, the deprecated com.android.support library, and outdated SDK/AndroidX versions.

gradle/libs.versions.toml

• com.android.tools.build:gradle: 4.2.0 → 8.3.2
• com.android.support:appcompat-v7:28.0.0 → androidx.appcompat:appcompat:1.6.1 (entry renamed android-support-appcompat → androidx-appcompat)
• androidx-annotation: 1.3.0 → 1.7.1
• androidx-lifecycle-common: 2.4.0 → 2.7.0

jme3-android-examples/build.gradle

AGP 8.x syntax and SDK target updates:

• Added namespace (required by AGP 7.3+); removed package from AndroidManifest.xml
• compileSdkVersion 28 → compileSdk 34
• targetSdkVersion 28 → targetSdk 34
• minSdkVersion 15 → minSdk 30 (Android 11+)
• lintOptions → lint
• Removed buildToolsVersion (auto-managed by AGP 8.x)
• Added compileOptions block (Java 11 source/target)
• Updated appcompat dependency reference to libs.androidx.appcompat

common-android-app.gradle

• Removed sourceCompatibility = '1.6'; Java compat is now set via compileOptions in the android DSL block

[riccardobl]

@copilot lets target android 11+ with java 11

[Copilot]

@copilot lets target android 11+ with java 11

Done in 0be260e — minSdk raised to 30 (Android 11 R) and compileOptions updated to JavaVersion.VERSION_11.

[github-actions]

🖼️ Screenshot tests have failed.

The purpose of these tests is to ensure that changes introduced in this PR don't break visual features. They are visual unit tests.

📄 Where to find the report:

• Go to the (failed run) > Summary > Artifacts > screenshot-test-report
• Download the zip and open jme3-screenshot-tests/build/reports/ScreenshotDiffReport.html

⚠️ If you didn't expect to change anything visual:
Fix your changes so the screenshot tests pass.

✅ If you did mean to change things:
Review the replacement images in jme3-screenshot-tests/build/changed-images to make sure they really are improvements and then replace and commit the replacement images at jme3-screenshot-tests/src/test/resources.

✨ If you are creating entirely new tests:
Find the new images in jme3-screenshot-tests/build/changed-images and commit the new images at jme3-screenshot-tests/src/test/resources.

Note; it is very important that the committed reference images are created on the build pipeline, locally created images are not reliable. Similarly tests will fail locally but you can look at the report to check they are "visually similar".

See https://github.com/jMonkeyEngine/jmonkeyengine/blob/master/jme3-screenshot-tests/README.md for more information

Contact @richardTingle (aka richtea) for guidance if required