add xds

Author: tarun-google

sdks/python/setup.py

@@ -404,6 +404,7 @@ def get_portability_package_data():
           'requests>=2.32.4,<3.0.0',
           'sortedcontainers>=2.4.0',
           'typing-extensions>=3.7.0',
+          'xds-protos>=1.70.0; python_version >= "3.13"',
           'zstandard>=0.18.0,<1',
           'pyyaml>=3.12,<7.0.0',
           'beartype>=0.21.0,<0.23.0',