Add C++ experimental API extensions for ALTS C stack
diff --git a/BUILD b/BUILD
index 0250eaa..e04d0df 100644
--- a/BUILD
+++ b/BUILD
@@ -1708,6 +1708,7 @@
         "src/core/tsi/alts/handshaker/alts_handshaker_service_api_util.h",
         "src/core/tsi/alts/handshaker/transport_security_common_api.h",
     ],
+    public_hdrs = GRPC_SECURE_PUBLIC_HDRS, 
     external_deps = [
         "nanopb",
     ],