Android/Firebase : click_action does not load activities when receiving notification from Firebase

Question

I am unable to load the activity even after passing click_action, below is my code please suggest what is the issue that when clicking on notification i am not able to load the HELLO WORLD activity.

POST: https://fcm.googleapis.com/fcm/send

{
  "to": "exVfE34wTymAo7oQjXFVaQ:APpUdLOfd2KCJwrqlZ0RyrCBXQ3T_XjVfJOhYXOVIjFAnCFpnXdT1lKern6NlKtA7YtTVgv9BJGcZuW2TfchapYMjinMTRTnTcD3pk97AzJwl73GLS-rXps_ADWgeP",
  "notification": {
    "title": "New FCM Message",
    "body": "Hello World!",
    "click_action": ".Activities.CustomerRebateConfirmation"
  },
  "data": {
    "image": "https://www.online-image-editor.com/styles/2019/images/power_girl_editor.png"
  }
}

And my SERVICE

public class MyFirebaseMessagingService extends FirebaseMessagingService {
    String CHANNEL_ID="2";
    String image_url=null;
    Bitmap image_bitmap=null;



public MyFirebaseMessagingService() {
}

@Override
public void onMessageReceived(@NonNull RemoteMessage remoteMessage) {
     if(remoteMessage.getNotification() !=null){

         if(remoteMessage.getData().containsKey("image") && remoteMessage.getData().get("image")!= null){
             image_url=remoteMessage.getData().get("image").toString();
             image_bitmap=getBitmapFromUrl(image_url);
         }

         showNotification(remoteMessage.getNotification().getTitle(),remoteMessage.getNotification().getBody());
     }
}


@Override
public void onNewToken(@NonNull String s) {
    super.onNewToken(s);
}

private  void showNotification(String title,String text){
    // create notification
    createNoficationChannel();

    Intent intent=new Intent(getApplicationContext(), MainActivity.class);
    PendingIntent pendingIntent= PendingIntent.getActivity(getApplicationContext(),
            0,
            intent,
            PendingIntent.FLAG_ONE_SHOT);

    // set sound for notification
    Uri defaultNotificationSound= RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);

    NotificationCompat.Builder builder=new NotificationCompat.Builder(this,
            CHANNEL_ID)
            .setSmallIcon(R.mipmap.ic_launcher)
            .setContentTitle(title)
            .setContentText(text)
            .setContentIntent(pendingIntent)
            .setLargeIcon(image_bitmap)
            .setSound(defaultNotificationSound)
            .setLights(Color.GREEN,500,200)
            .setVibrate(new long[]{0, 250, 250, 250})
            .setStyle(new NotificationCompat.BigPictureStyle()
                    .bigPicture(image_bitmap)
                     .bigLargeIcon(null))
            .setAutoCancel(true)
            .setPriority(NotificationCompat.PRIORITY_DEFAULT);

    NotificationManagerCompat notificationManagerCompat=NotificationManagerCompat.
            from(this);
    Long l= new Long(System.currentTimeMillis());
    int i=l.intValue();


    //Notification ID is unique for each notification you create
    notificationManagerCompat.notify(i,builder.build());
}

public  void createNoficationChannel(){

    // create Notification Channel  only on API level 26+
    // Notification Channel is a new class and not in the support library
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O)  {
        String name="All Notification Channel";
        String description= "All kind of notification from Traffic checker app";

        int importance= NotificationManager.IMPORTANCE_DEFAULT;

        NotificationChannel channel=new NotificationChannel(CHANNEL_ID,name,importance);
        channel.setVibrationPattern(new long[]{0, 250, 250, 250});
        channel.setDescription(description);

        //Register the channel with the system
        //You cannot change importance or other notification behaviour after the this
        NotificationManager manager= getSystemService(NotificationManager.class);
        manager.createNotificationChannel(channel);
    }
}

private Bitmap getBitmapFromUrl(String image_url) {
    try {
    URL url=new URL(image_url);
    HttpURLConnection connection=(HttpURLConnection) url.openConnection();
    connection.setDoInput(true);
    connection.connect();
    InputStream  inputStream=connection.getInputStream();
    return BitmapFactory.decodeStream(inputStream);
    } catch (IOException e) {
        e.printStackTrace();
        return null;
    }
}

AndroidManifest.xml

<application
    android:name=".data.ThisApplication"
    android:allowBackup="true"
    android:hardwareAccelerated="true"
    android:icon="@mipmap/ic_launcher"
    android:label="@string/app_name"
    android:largeHeap="true"
    android:roundIcon="@mipmap/ic_launcher_round"
    android:supportsRtl="true"
    android:theme="@style/AppTheme"
    android:usesCleartextTraffic="true">

    <activity
        android:name=".HelloWorld"  >
        <intent-filter>
            <action android:name=".Activities.CustomerRebateConfirmation" />
            <category android:name="android.intent.category.DEFAULT" />
        </intent-filter>
    </activity>