Allow build layer to recognize layers imported from tensorflow keras

[lcwongme]

• MLPrimitives version: 0.3.3.dev0
• Python version: 3.7.0
• Operating System: macOS

Description

Allow ml.primitives.adapters.build_layer to also recognize layers imported from tensorflow.keras.

What I Did

Current Version:

if issubclass(layer_class, keras.layers.wrappers.Wrapper):

Suggested Changes:

if issubclass(layer_class, tf.keras.layers.Wrapper) or issubclass(layer_class, keras.layers.wrappers.Wrapper):