Use instance member createNotificationBuilder

Author: aurimasc

com.unity.mobile.notifications/Runtime/Android/Plugins/com/unity/androidnotifications/UnityNotificationUtilities.java

@@ -542,7 +542,7 @@ protected static Notification.Builder recoverBuilder(Context context, Notificati
 
     private static Notification.Builder recoverBuilderCustom(Context context, Notification notification) {
         String channelID = notification.extras.getString(KEY_CHANNEL_ID);
-        Notification.Builder builder = UnityNotificationManager.createNotificationBuilder(context, channelID);
+        Notification.Builder builder = UnityNotificationManager.getNotificationManagerImpl(context).createNotificationBuilder(channelID);
         UnityNotificationManager.setNotificationIcon(builder, KEY_SMALL_ICON, notification.extras.getString(KEY_SMALL_ICON));
         String largeIcon = notification.extras.getString(KEY_LARGE_ICON);
         if (largeIcon != null && !largeIcon.isEmpty())