Popup instead of fullscreen when triggered from system buttons about dicio-android HOT 6 OPEN

<activity android:name=".PopupActivity"
           android:theme="@style/Theme.AppCompat.Dialog"
           android:launchMode="singleInstance"
           android:excludeFromRecents="true"
           android:taskAffinity=""
           android:configChanges="orientation|screenSize"
           android:windowSoftInputMode="stateAlwaysHidden|adjustResize"
           android:exported="true">
           <intent-filter>
               <action android:name="android.intent.action.POPUP_ACTIVITY" />
               <category android:name="android.intent.category.DEFAULT" />
           </intent-filter>
       </activity>

import android.app.Activity;
import android.os.Bundle;
import android.view.Window;
import android.view.WindowManager;
import android.widget.TextView;

public class PopupActivity extends Activity {
    @Override
    protected void onCreate(final Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        requestWindowFeature(Window.FEATURE_NO_TITLE);
        getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
                WindowManager.LayoutParams.FLAG_FULLSCREEN);

        setContentView(R.layout.dialog_stt_service);

        final TextView messageView = findViewById(R.id.userInput);
                messageView.setText("CMOS");
        finish();
    }
}

protected void onPause() {
        super.onPause();
        if (skillEvaluator != null) {
            skillEvaluator.cancelGettingInput();
            final Intent intent = new Intent(this, PopupActivity.class);
            startActivity(intent);
        }
    }