Add comment to shared range method in quantization. That method is needed because of restrictions in TFLite's LSTM kernel. It was not very clear in the original comments.
Add comment to shared range method in quantization. That method is needed because of restrictions in TFLite's LSTM kernel. It was not very clear in the original comments.

PiperOrigin-RevId: 283399107
Change-Id: I51dbcdb49daeaf950d550405d4c31f918cf52ebe

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