message: Add descriptions for Task Library in tflite_support Pypi
diff: This PyPI package includes the Python bindings for following features:
  + - Task Library: a set of powerful and easy-to-use task-specific libraries to
  + integrate TFLite models onto various platforms. See the [Task Library
  + documentation](https://www.tensorflow.org/lite/inference_with_metadata/task_library/overview)
  + for more information.
  - Metadata schemas: wraps TFLite model schema and metadata schema in Python.
  - - Metadata populator and displayer: can be used to populate the metadata and
  + - Metadata writer and displayer: can be used to populate the metadata and
  associated files into the model, as well as converting the populated metadata
  - into the json format.
  + into the json format. See the [Metadata
  + documentation](https://www.tensorflow.org/lite/convert/metadata) for more
  + information.
  - Android Codegen tool: generates the Java model interface used in Android for
  - a particular model.
  + a particular model. See the [Codegen tool
  + documentation](https://www.tensorflow.org/lite/inference_with_metadata/codegen)
  + for more information.
  """
  from __future__ import absolute_import
  