message: Add the config switch for keras to enable PIP package testing in OSS.
diff: @@ -18,6 +18,12 @@ filegroup(
  ],
  )
  +config_setting(
  + name = "no_keras_py_deps",
  + define_values = {"no_keras_py_deps": "true"},
  + visibility = ["//visibility:public"],
  +)
  +
  py_library(
  name = "keras",
  srcs = [
  