show window in app_process (impossible to work from Android 14 QPR 3 or Android 15, as addView requires the calling process an Android app process)

gistfile1.txt

 token = new Binder();
        try {
            Context _context = android.app.ActivityThread.systemMain().getSystemContext();
            final Context context = new ContextWrapper(_context) {
                @Override
                public Object getSystemService(String name) {
                    if (Context.WINDOW_SERVICE.equals(name)) {
                        WindowManager wm = (WindowManager) super.getSystemService(name);
                        if (wm != null) {
                            ((android.view.WindowManagerImpl) wm).setDefaultToken(token);
                        }
                        return wm;
                    }
                    return super.getSystemService(name);
                }
            };
            context.setTheme(android.R.style.Theme_Material_Light);

            CharSequence label = context.getPackageManager().getApplicationLabel(context.getPackageManager().getApplicationInfo("com.android.settings", 0));
            LogUtils.i("label " + label);

            android.widget.Toast.makeText(context, "test", Toast.LENGTH_LONG).show();
            LogUtils.i("toast");

            android.view.WindowManager wm = context.getSystemService(WindowManager.class);
            LogUtils.i("class: " + wm.getClass().getName());

            //((android.view.WindowManagerImpl) wm).setDefaultToken(token);
            LinearLayout root = new LinearLayout(context);
            root.setBackground(new ColorDrawable(0xffffffff));
            TextView textView = new TextView(context);
            textView.setText("test");
            root.addView(textView);
            Button button = new Button(context);
            button.setSoundEffectsEnabled(false);
            button.setText("test");
            button.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    Toast.makeText(context, "?!", Toast.LENGTH_LONG).show();
                }
            });
            root.addView(button);

            WindowManager.LayoutParams params = new WindowManager.LayoutParams(
                    WindowManager.LayoutParams.WRAP_CONTENT,
                    WindowManager.LayoutParams.WRAP_CONTENT,
                    WindowManager.LayoutParams.TYPE_SYSTEM_DIALOG,
                    WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL,
                    PixelFormat.TRANSLUCENT);

            params.gravity = Gravity.CENTER;
            params.x = 0;
            params.y = 0;
            wm.addView(root, params);
        } catch (Throwable tr) {
            LogUtils.e(tr.getMessage(), tr);
        }

And unfortunately I am getting this on Android 12.

java.lang.NullPointerException
        at android.os.Parcel.createExceptionOrNull(Parcel.java:2431)
        at android.os.Parcel.createException(Parcel.java:2409)
        at android.os.Parcel.readException(Parcel.java:2392)
        at android.os.Parcel.readException(Parcel.java:2334)
        at com.android.internal.app.IAppOpsService$Stub$Proxy.reportRuntimeAppOpAccessMessageAndGetConfig(IAppOpsService.java:1666)
        at android.app.AppOpsManager$1.reportStackTraceIfNeeded(AppOpsManager.java:290)
        at android.app.AppOpsManager$1.onNoted(AppOpsManager.java:265)
        at android.app.AppOpsManager.readAndLogNotedAppops(AppOpsManager.java:9359)
        at android.os.Parcel.readExceptionCode(Parcel.java:2356)
        at android.os.Parcel.readException(Parcel.java:2331)
        at android.view.IWindowSession$Stub$Proxy.addToDisplayAsUser(IWindowSession.java:1374)
        at android.view.ViewRootImpl.setView(ViewRootImpl.java:1119)
        at android.view.WindowManagerGlobal.addView(WindowManagerGlobal.java:399)
        at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:133)
        at com.termux.x11.CmdEntryPoint.lambda$windowManager$3(CmdEntryPoint.java:286)
        at com.termux.x11.CmdEntryPoint.$r8$lambda$MIV7qHiVNsG1buhNHJnI7A8pV3A(CmdEntryPoint.java:0)
        at com.termux.x11.CmdEntryPoint$$ExternalSyntheticLambda1.run(R8$$SyntheticClass:0)
        at android.os.Handler.handleCallback(Handler.java:938)
        at android.os.Handler.dispatchMessage(Handler.java:99)
        at android.os.Looper.loopOnce(Looper.java:201)
        at android.os.Looper.loop(Looper.java:288)
        at com.termux.x11.CmdEntryPoint.main(CmdEntryPoint.java:71)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.termux.x11.Loader.main(Loader.java:26)
        at com.android.internal.os.RuntimeInit.nativeFinishInit(Native Method)
        at com.android.internal.os.RuntimeInit.main(RuntimeInit.java:355)
Caused by: android.os.RemoteException: Remote stack trace:
        at com.android.internal.util.AnnotationValidations.validate(AnnotationValidations.java:129)
        at android.app.SyncNotedAppOp.<init>(SyncNotedAppOp.java:227)
        at android.app.SyncNotedAppOp$1.createFromParcel(SyncNotedAppOp.java:243)
        at android.app.SyncNotedAppOp$1.createFromParcel(SyncNotedAppOp.java:235)
        at com.android.internal.app.IAppOpsService$Stub.onTransact(IAppOpsService.java:728)

Any suggestions?

Change opPackageName? I don't remember:(

Btw, this will never work starting from Android 14 QPR 3 or Android 15, as addView now checks if the calling process is a valid Android app process.

Maybe there is some workaround for this? The most important thing I need is to draw something as an overlay from background process.
I am not writing viruses. Simply some oems put code to limit GPU performance of background apps.
Maybe SurfaceControl.Transactions?