move utilities to a separate file
diff --git a/tools/run_tests/sources_and_headers.json b/tools/run_tests/sources_and_headers.json
index 3effc04..0b4ff0d 100644
--- a/tools/run_tests/sources_and_headers.json
+++ b/tools/run_tests/sources_and_headers.json
@@ -4000,6 +4000,7 @@
"src/proto/grpc/testing/echo_messages.grpc.pb.h",
"src/proto/grpc/testing/echo_messages.pb.h",
"test/cpp/end2end/test_service_impl.h",
+ "test/cpp/util/byte_buffer_proto_helper.h",
"test/cpp/util/cli_call.h",
"test/cpp/util/create_test_channel.h",
"test/cpp/util/string_ref_helper.h",
@@ -4010,6 +4011,8 @@
"src": [
"test/cpp/end2end/test_service_impl.cc",
"test/cpp/end2end/test_service_impl.h",
+ "test/cpp/util/byte_buffer_proto_helper.cc",
+ "test/cpp/util/byte_buffer_proto_helper.h",
"test/cpp/util/cli_call.cc",
"test/cpp/util/cli_call.h",
"test/cpp/util/create_test_channel.cc",