*   `tf.lite`:

    *   The recommended Android NDK version for building TensorFlow Lite has
        been changed from r18b to r19c.
    *   Supports int64 for mul.
    *   Supports native variable builtin ops - ReadVariable, AssignVariable.
    *   Converter:
        *   Experimental support for variables in TFLite. To enable through
            conversion, users need to set