Mistake in the Cache-aware streaming example script
Hello,

it looks like there's a mistake in the [cache-aware streaming example.](https://github.com/NVIDIA/NeMo/blob/786a8501db2bd3854ed6f629a51fe2792b58bb00/examples/asr/asr_cache_aware_streaming/speech_to_text_cache_aware_streaming_infer.py)
[This argument ](https://github.com/NVIDIA/NeMo/blob/0322b324e815c155f90e75dde2eff78d3b9d3dd4/examples/asr/asr_cache_aware_streaming/speech_to_text_cache_aware_streaming_infer.py#L238) doesn't have any impact, because by design it applies input features normalization right before return from [this function](https://github.com/NVIDIA/NeMo/blob/main/nemo/collections/asr/parts/utils/streaming_utils.py#L1499), but output of this function is never used (because [self.buffer](https://github.com/NVIDIA/NeMo/blob/main/nemo/collections/asr/parts/utils/streaming_utils.py#L1311) is the actual place where NN inputs are stored).

I see that code related to this example was moved in December from one place to another, as well as some refactoring was done, so I expect there may be that some changes were done in these 2 files I'm referring to, and docstrings were not updated.

Summarizing all the above, this is my question: 
is there a mistake in the docs [here](https://github.com/NVIDIA/NeMo/blob/main/examples/asr/asr_cache_aware_streaming/speech_to_text_cache_aware_streaming_infer.py#L54) and we just don't need to do online normalization, or is it mistake in the [CacheAwareStreamingAudioBuffer](https://github.com/NVIDIA/NeMo/blob/2a6101421f4366ec28bac1165f26fec8eeedea59/nemo/collections/asr/parts/utils/streaming_utils.py#L1298) and normalized features should be stored in the buffer?

Thank you for response!