Don't show error when download was cancelled (#6476)

core/src/main/java/de/danoeh/antennapod/core/service/FeedUpdateWorker.java

@@ -146,7 +146,7 @@ public class FeedUpdateWorker extends Worker {
         downloader.call();
 
         if (!downloader.getResult().isSuccessful()) {
-            if (downloader.cancelled) {
+            if (downloader.cancelled || downloader.getResult().getReason() == DownloadError.ERROR_DOWNLOAD_CANCELLED) {
                 return;
             }
             DBWriter.setFeedLastUpdateFailed(request.getFeedfileId(), true);

core/src/main/java/de/danoeh/antennapod/core/service/download/HttpDownloader.java

@@ -317,6 +317,7 @@ public class HttpDownloader extends Downloader {
     private void onCancelled() {
         Log.d(TAG, "Download was cancelled");
         result.setCancelled();
+        cancelled = true;
         cleanup();
     }