Fix the error reported by tools/run_tests/check_sources_and_headers.py
diff --git a/tools/run_tests/sources_and_headers.json b/tools/run_tests/sources_and_headers.json
index 73dc30d..1fb1da2 100644
--- a/tools/run_tests/sources_and_headers.json
+++ b/tools/run_tests/sources_and_headers.json
@@ -1665,6 +1665,7 @@
"grpc_test_util"
],
"headers": [
+ "test/cpp/interop/client_helper.h",
"test/cpp/interop/interop_client.h",
"test/cpp/interop/stress_interop_client.h",
"test/proto/empty.grpc.pb.h",
@@ -1677,6 +1678,7 @@
"language": "c++",
"name": "stress_test",
"src": [
+ "test/cpp/interop/client_helper.h",
"test/cpp/interop/interop_client.cc",
"test/cpp/interop/interop_client.h",
"test/cpp/interop/stress_interop_client.cc",