assistant_helpers.py logs to root

[Lx]

Functions in assistant_helpers.py log directly to the root logger:

assistant-sdk-python/google-assistant-sdk/googlesamples/assistant/grpc/assistant_helpers.py

Line 30 in ce76c50

logging.debug('AssistRequest: audio_in (%d bytes)',

assistant-sdk-python/google-assistant-sdk/googlesamples/assistant/grpc/assistant_helpers.py

Line 47 in ce76c50

logging.debug('AssistResponse: %s audio_data (%d bytes)',

assistant-sdk-python/google-assistant-sdk/googlesamples/assistant/grpc/assistant_helpers.py

Line 51 in ce76c50

logging.debug('AssistResponse: audio_data (%d bytes)',

assistant-sdk-python/google-assistant-sdk/googlesamples/assistant/grpc/assistant_helpers.py

Line 54 in ce76c50

logging.debug('AssistResponse: %s', resp_copy)

Could these please be changed to the recommended logging.getLogger(__name__).…?