[transfer-engine] Update notification icon configuration. JB#50444

Also use same icon for all notifications.

src/transferengine.cpp

@@ -335,8 +335,7 @@ void TransferEnginePrivate::sendNotification(TransferEngineData::TransferType ty
     QString previewSummary;
     bool useProgress = false;
     Notification::Urgency urgency = Notification::Normal;
-    QString appIcon = QStringLiteral("icon-lock-information");
-    QString icon = QStringLiteral("icon-lock-transfer");
+    QString appIcon = QStringLiteral("icon-lock-transfer");
 
     // TODO: explicit grouping of transfer notifications is now removed, as grouping
     // will now be performed by lipstick.  We may need to reinstate group summary
@@ -383,9 +382,7 @@ void TransferEnginePrivate::sendNotification(TransferEngineData::TransferType ty
 
     } else if (status == TransferEngineData::TransferInterrupted) {
         urgency = Notification::Critical;
-        appIcon = QStringLiteral("icon-lock-information");
         category = TRANSFER_ERROR_EVENT_CATEGORY;
-        icon.clear();
 
         switch (type) {
         case TransferEngineData::Upload:
@@ -468,8 +465,8 @@ void TransferEnginePrivate::sendNotification(TransferEngineData::TransferType ty
         notification.setPreviewBody(previewBody);
         notification.setUrgency(urgency);
 
-        if (!icon.isEmpty()) {
-            notification.setIcon(icon);
+        if (!appIcon.isEmpty()) {
+            notification.setAppIcon(appIcon);
         }
 
         if (useProgress) {