Added media type to class and replaced "song" with a generic "media"

app/src/main/java/com/cappielloantonio/play/repository/DownloadRepository.java

@@ -128,7 +128,7 @@ public class DownloadRepository {
 
         @Override
         public void run() {
-            downloadDao.delete(download.getSongID());
+            downloadDao.delete(download.getMediaID());
         }
     }
 }