message: Support TFRT async config.
diff: @@ -713,8 +713,8 @@ TFE_Context* TFE_NewContext(const TFE_ContextOptions* opts, TF_Status* status) {
  status->status = tfrt::ListOpHandlerChains(
  opts->session_options.options, &op_handler_chains, &device_attributes);
  if (!status->status.ok()) return nullptr;
  - return tensorflow::wrap(
  - new tfrt::ContextInterface(op_handler_chains, device_attributes));
  + return tensorflow::wrap(new tfrt::ContextInterface(
  + op_handler_chains, device_attributes, opts->async));
  #else
  status->status = tensorflow::errors::Unimplemented("TFRT is not supported");
  return nullptr;
  