message: Re-export is_tfrt_enabled() through context.
  Alternatively, calling tfrt_utils.is_tfrt_enabled() directly is also an option, but we will add tfrt enabling/disabling API later, and ultimately the context instance will be the right place to query the definite state of the runtime, so keep having it inside context.py.
diff: @@ -75,6 +75,9 @@ _python_eager_context_create_counter = monitoring.Counter(
  "/tensorflow/api/python/eager_context_create_counter",
  "Counter for number of eager contexts created in Python.")
  +# Re-exporting through context.
  +is_tfrt_enabled = tfrt_utils.enabled
  +
  class _EagerTensorCache(object):
  """Simple cache which evicts items based on length in a FIFO manner."""
  