message: Log actual type with sparse feature parsing errors
diff: @@ -657,7 +657,8 @@ Status FastParseSerializedExample(
  example_dtype != config.sparse[d].dtype) {
  return example_error(strings::StrCat(
  "Data types don't match. ",
  - "Expected type: ", DataTypeString(config.sparse[d].dtype)));
  + "Expected type: ", DataTypeString(config.sparse[d].dtype),
  + ", Actual type: ", DataTypeString(example_dtype)));
  }
  switch (config.sparse[d].dtype) {
  