fix pending update state clean when discarding Update

-- When application triggers `DiscardUpdate` with `WEAVE_NO_ERROR`, reset pending set state.

Author: yunhanw-google

src/lib/profiles/data-management/Current/SubscriptionClient.cpp

@@ -2913,6 +2913,7 @@ void SubscriptionClient::AbortUpdates(WEAVE_ERROR aErr)
     {
         numPending = mPendingUpdateSet.GetNumItems();
         mPendingUpdateSet.Clear();
+        SetPendingSetState(kPendingSetEmpty);
 
         numInProgress = mInProgressUpdateList.GetNumItems();
         mInProgressUpdateList.Clear();