TFLite Edge model update TFLite edge models are now enhanced with metadata

## Change **TFLite Edge model update** TFLite edge models are now enhanced with metadata. Models trained in the next 6 months will be backwards compatible as separate metadata and label files are included. TFLite models trained after this time may not be backwards compatible. For more information see: * [Adding metadata to TensorFlow Lite models](https://www.tensorflow.org/lite/convert/metadata)