hack(ble): Turn of encryption after closing a connection

lib/sdk/Libraries/BTLE/link_layer/controller/sources/ble/lctr/lctr_sm_conn_slave.c

@@ -217,6 +217,9 @@ void lctrConnStatelessEventHandler(lctrConnCtx_t *pCtx, uint8_t event)
   {
     case LCTR_CONN_TERMINATED:
       LL_TRACE_INFO2("lctrConnStatelessEventHandler: handle=%u, state=%u, event=TERMINATED", LCTR_GET_CONN_HANDLE(pCtx), pCtx->state);
+      lctrDisableTxDataEnc(pCtx);
+      lctrDisableRxDataEnc(pCtx);
+      lctrCalcSessionKey(pCtx);
       lctrNotifyHostDisconnectInd(pCtx);
       lctrFreeConnCtx(pCtx);
       break;