message: Add source, destination name to _send traceme to allow easier debugging
diff: @@ -181,7 +181,10 @@ Status CopyInputToExpectedDevice(EagerContext* ctx, EagerOperation* op,
  // We are only here if the policy is warn or silent copies, so we should
  // trigger a copy.
  TensorHandle* result_handle = nullptr;
  - profiler::TraceMe activity("_Send", profiler::TraceMeLevel::kInfo);
  + profiler::TraceMe activity(
  + absl::StrCat("_Send input ", i, " from ", handle_device->name(), " to ",
  + expected_input_device->name()),
  + profiler::TraceMeLevel::kInfo);
  Status status =
  EagerCopyToDevice(handle, ctx, &op->Executor(), expected_input_device,
  ctx->MirrorTensors(), &result_handle);
  