Simplify: Use pre-installed Java and Gradle in Runner container

.gitea/workflows/android-build.yml

@@ -15,26 +15,11 @@ jobs:
     - name: Checkout code
       uses: actions/checkout@v4
 
-    - name: Install JDK 17 (Manual)
-      run: |
-        # 手动下载并安装 JDK 17 ARM64
-        cd /tmp
-        wget -q https://github.com/adoptium/temurin17-binaries/releases/download/jdk-17.0.11%2B9/OpenJDK17U-jdk_aarch64_linux_hotspot_17.0.11_9.tar.gz
-        tar -xzf OpenJDK17U-jdk_*.tar.gz -C /opt
-        ln -sf /opt/jdk-*/bin/java /usr/local/bin/java
-        ln -sf /opt/jdk-*/bin/javac /usr/local/bin/javac
-        java -version
-        export JAVA_HOME=/opt/jdk-*
-        echo "JAVA_HOME=$JAVA_HOME" >> $GITHUB_ENV
-        echo "/opt/jdk-*/bin" >> $GITHUB_PATH
-
-    - name: Install Gradle
-      run: |
-        apk add --no-cache gradle
-        gradle --version
-
     - name: Build with Gradle
       run: |
+        # 使用容器预装的 Java 和 Gradle
+        java -version
+        gradle --version
         gradle wrapper --gradle-version 8.2
         ./gradlew assembleDebug --no-daemon --stacktrace