message: Return the custom_name of a delegate op if it's set.
diff: @@ -127,14 +127,15 @@ TfLiteQuantizationParams GetLegacyQuantization(
  static constexpr const char kUnknownCustomOpName[] = "UnknownCustomOp";
  const char* GetTFLiteOpName(const TfLiteRegistration& op_reg) {
  - const char* op_name = nullptr;
  if (op_reg.builtin_code == tflite::BuiltinOperator_CUSTOM) {
  const char* const custom_name = op_reg.custom_name;
  - op_name = custom_name ? custom_name : kUnknownCustomOpName;
  - } else {
  - op_name = tflite::EnumNamesBuiltinOperator()[op_reg.builtin_code];
  + return custom_name ? custom_name : kUnknownCustomOpName;
  + }
  + if (op_reg.builtin_code == tflite::BuiltinOperator_DELEGATE &&
  + op_reg.custom_name) {
  + return op_reg.custom_name;
  }
  - return op_name;
  + return tflite::EnumNamesBuiltinOperator()[op_reg.builtin_code];
  }
  } // namespace
  