[Gradle] Gradle Version Upgrade

[Dhruv-Mishra]

Changes

Updated AGP version from 7.5 to 8.13
Updated Compile Options to use JVM 17

Pull request checklist

This PR has considered:

• Light and Dark appearances
• Automated Tests
• Documentation and demo app examples
• VoiceOver and Keyboard Accessibility
• Internationalization and RTL layouts
• Size classes and window sizes (notched devices, multitasking, different window sizes, etc)

[Copilot]

Pull Request Overview

This PR upgrades Gradle and Android build tooling across the FluentUI Android project, moving from Gradle 7.x to 8.x and updating compilation targets to JVM 17.

• Upgraded Gradle wrapper from version 7.5 to 8.13
• Updated all modules to use JVM 17 compilation targets and Kotlin JVM toolchain 17
• Migrated from legacy plugin application syntax to modern plugins block syntax
• Moved package declarations from AndroidManifest.xml to build.gradle namespace declarations (AGP 8.x requirement)

Reviewed Changes

Copilot reviewed 38 out of 39 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
gradle/wrapper/gradle-wrapper.properties	Updated Gradle distribution URL from 7.5 to 8.13
gradle.properties	Added AGP 8.x compatibility properties for resource handling
fluentui_*/build.gradle	Updated build configurations for JVM 17, modern plugin syntax, and namespace declarations
fluentui_*/AndroidManifest.xml	Removed package declarations as required by AGP 8.x
FluentUI.Demo/build.gradle	Updated demo app build configuration for JVM 17 and modern syntax

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