Rename NotifierListener to NotificationListener.

client/android/Notifier/app/src/main/AndroidManifest.xml

@@ -17,7 +17,7 @@
         tools:targetApi="31">
 
         <service
-            android:name=".NotifierService"
+            android:name=".NotificationListener"
             android:enabled="true"
             android:exported="true"
             android:permission="android.permission.BIND_NOTIFICATION_LISTENER_SERVICE">

client/android/Notifier/app/src/main/java/com/mobilesec/client/notifier/NotifierService.java → client/android/Notifier/app/src/main/java/com/mobilesec/client/notifier/NotificationListener.java

 package com.mobilesec.client.notifier;
 
 import android.content.Intent;
-import android.service.notification.NotificationListenerService;
 import android.service.notification.StatusBarNotification;
 import android.util.Log;
 
 import androidx.localbroadcastmanager.content.LocalBroadcastManager;
 
 // SEE https://developer.android.com/training/notify-user/build-notification
-public class NotifierService extends NotificationListenerService {
+public class NotificationListener extends android.service.notification.NotificationListenerService {
 
     @Override
     public void onNotificationPosted(StatusBarNotification sbn) {