Upgrade Gradle and fix Android deprecation errors

Upgrade to Gradle 8.5 and Gradle Plugin 8.3.0 for compatibility with Java 21. Explicity set Java version 21 in `build.gradle`. Increment compile and target SDK version to 34 accordingly.

Remove the explicitly defined, obsolete `buildToolsVersion` property in `build.gradle`, as it is now automatically derived by Gradle.

Replace the deprecated property `android:extractNativeLibs` in `AndroidMainfest.xml` with `useLegacyPackaging` in `build.gradle`.

Replace the deprecated package definition `package="tw.DDNet"` in `AndroidMainfest.xml` with `namespace("tw.DDNet")` in `build.gradle`.

Add the required property `android:exported="true"` to the main activity in `AndroidMainfest.xml`.

scripts/android/files/AndroidManifest.xml

@@ -1,6 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<manifest xmlns:android="http://schemas.android.com/apk/res/android"
-	package="tw.DDNet">
+<manifest xmlns:android="http://schemas.android.com/apk/res/android">
 	<uses-feature
 		android:glEsVersion="0x00030000" />
 	<uses-feature
@@ -21,7 +20,6 @@
 		android:usesCleartextTraffic="true"
 		android:label="@string/app_name"
 		android:hasCode="true"
-		android:extractNativeLibs="true"
 		android:supportsRtl="true"
 		android:isGame="true"
 		android:icon="@mipmap/ic_launcher"
@@ -29,16 +27,16 @@
 		android:theme="@android:style/Theme.NoTitleBar.Fullscreen">
 		<activity
 			android:name=".NativeMain"
+			android:exported="true"
 			android:configChanges="orientation|screenSize|screenLayout|keyboardHidden"
 			android:screenOrientation="landscape">
 			<intent-filter>
 				<action android:name="android.intent.action.MAIN" />
-
 				<category android:name="android.intent.category.LAUNCHER" />
 			</intent-filter>
-			<meta-data android:name="android.app.lib_name"
+			<meta-data
+				android:name="android.app.lib_name"
 				android:value="DDNet" />
 		</activity>
 	</application>
-
 </manifest>

scripts/android/files/build.gradle

@@ -10,19 +10,25 @@ buildscript {
 	}
 	
 	dependencies {
-		classpath 'com.android.tools.build:gradle:7.2.1'
+		classpath 'com.android.tools.build:gradle:8.3.0'
 		classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
 	}
 }
 
+java {
+	toolchain {
+		languageVersion.set(JavaLanguageVersion.of(21))
+	}
+}
+
 android {
-	compileSdkVersion 30
-	buildToolsVersion "30.0.3"
+	compileSdkVersion 34
 	ndkVersion "TW_NDK_VERSION"
 	defaultConfig {
 		applicationId "tw.DDNet"
+		namespace("tw.DDNet")
 		minSdkVersion 24
-		targetSdkVersion 30
+		targetSdkVersion 34
 		versionCode TW_VERSION_CODE
 		versionName "TW_VERSION_NAME"
 	}
@@ -46,7 +52,11 @@ android {
 			shrinkResources false
 		}
 	}
-	
+	packagingOptions {
+		jniLibs {
+			useLegacyPackaging = true
+		}
+	}
 	sourceSets {
 		main {
 			assets.srcDirs = ['assets']

scripts/android/files/gradle-wrapper.properties

@@ -1,5 +1,5 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-7.4.2-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.5-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists