rk3568 android11 从frameworks添加服务到 android studio app应用

1.在frameworks下添加，其目录如下：

1.1 添加IDemoManager.aidl文件

//mls_demo
// IDemoManager.aidl
package android.app;

// Declare any non-default types here with import statements

interface IDemoManager {
    int plus(int a, int b);
}
 

1.2 添加 DemoManager.java文件

//mls_demo
package android.app;

import android.annotation.SystemService;

import android.content.Context;
import android.compat.annotation.UnsupportedAppUsage;
import android.os.IBinder;
import android.os.RemoteException;
import android.os.ServiceManager;
import android.util.Log;
import android.util.Singleton;

@SystemService(Context.DEMO_SERVICE)
public class DemoManager {
    private static String TAG = "DemoManager";

    /**
     * @hide
     */
    @UnsupportedAppUsage
    public static IDemoManager getService() {
        return IDemoManagerSingleton.get();
    }

    @UnsupportedAppUsage
    private static final Singleton<IDemoManager> IDemoManagerSingleton =
            new Singleton<IDemoManager>() {
                @Override
                protected IDemoManager create() {
                    final IBinder b = ServiceManager.getService(Context.DEMO_SERVICE);
                    fina