Prevent exception from being serialized in ErrorInfo

The wrong @Decorator was put in the wrong place to mark the throwable fieldd as transient, now this is fixed and the exception is not serialized. So if a non-serializable throwable is passed, that's not an issue, since it's not going to be serialized. The need for EnsureExceptionSerializable is also gone.

app/src/main/java/us/shandian/giga/ui/adapter/MissionAdapter.java

@@ -583,7 +583,7 @@ public class MissionAdapter extends Adapter<ViewHolder> implements Handler.Callb
 
         ErrorUtil.createNotification(mContext,
                 new ErrorInfo(ErrorInfo.Companion.throwableToStringList(mission.errObject), action,
-                        service, request.toString(), reason, null));
+                        service, request.toString(), reason));
     }
 
     public void clearFinishedDownloads(boolean delete) {