message: Add a warning to discourage expanding tensorflow:internal visibility scope
diff: @@ -420,6 +420,9 @@ config_setting(
  values = {"cpu": "x64_windows"},
  )
  +# DO NOT ADD ANY NEW EXCEPTIONS TO THIS LIST!
  +# Instead, please use public APIs or public build rules TF provides.
  +# If you need functionality that is not exposed, we will work with you to expand our public APIs.
  package_group(
  name = "internal",
  packages = [
  