[FIX] Server Test Push Notification (#1508)

Co-authored-by: Diego Mello <diegolmello@gmail.com>

android/app/src/main/java/chat/rocket/reactnative/CustomPushNotification.java

@@ -61,7 +61,7 @@ public class CustomPushNotification extends PushNotification {
         }
         notificationMessages.get(notId).add(message);
 
-        super.postNotification(Integer.parseInt(notId));
+        super.postNotification(notId != null ? Integer.parseInt(notId) : 1);
 
         notifyReceivedToJS();
     }
@@ -91,7 +91,7 @@ public class CustomPushNotification extends PushNotification {
             .setDefaults(Notification.DEFAULT_ALL)
             .setAutoCancel(true);
 
-        Integer notificationId = Integer.parseInt(notId);
+        Integer notificationId = notId != null ? Integer.parseInt(notId) : 1;
         notificationChannel(notification);
         notificationIcons(notification, bundle);
         notificationStyle(notification, notificationId, bundle);

android/app/src/main/java/chat/rocket/reactnative/Ejson.java

@@ -14,7 +14,7 @@ public class Ejson {
     private SharedPreferences sharedPreferences = RNUserDefaultsModule.getPreferences(CustomPushNotification.reactApplicationContext);
 
     public String getAvatarUri() {
-        if (!type.equals("d")) {
+        if (type == null || !type.equals("d")) {
             return null;
         }
         return serverURL() + "/avatar/" + this.sender.username + "?rc_token=" + token() + "&rc_uid=" + userId();