message: [TF Data Service] Use the gRPC local pool rather than the default global pool. In edge cases, this change should improve the networking throughput on TPUs. In regular cases, this change should be a no op.
diff: @@ -233,6 +233,7 @@ Status DataServiceDispatcherClient::EnsureInitialized() {
  CredentialsFactory::CreateClientCredentials(protocol_, &credentials));
  grpc::ChannelArguments args;
  args.SetMaxReceiveMessageSize(std::numeric_limits<int32>::max());
  + args.SetInt(GRPC_ARG_USE_LOCAL_SUBCHANNEL_POOL, true);
  auto channel = grpc::CreateCustomChannel(address_, credentials, args);
  stub_ = DispatcherService::NewStub(channel);
  return Status::OK();
  