Update Android app to target latest API level and Google SDKs

[sande11]

Update Android app to target latest API level and Google SDKs

Description:

Google Play requires apps to target the latest Android API levels and use up-to-date Google SDKs. This task involves upgrading GATBReferenceGuide-Android to meet Play Store compliance requirements.

Tasks:

• Update compileSdkVersion and targetSdkVersion in build.gradle to API 36 (Android 16).

• Update buildToolsVersion if required.

• Upgrade all dependencies in build.gradle to their latest stable versions.

• Sync project with Gradle and resolve any dependency conflicts.

• Test app on Android 16 emulator/device to ensure compatibility.

Testing:

• App compiles and runs successfully with targetSdkVersion 36.

• All Google SDKs are updated to latest stable releases.

• Tests pass without breaking core functionality.