Adding a spectrum augmenter layer based on lingvo spectrum augmenter layer: https://github.com/tensorflow/lingvo/blob/master/lingvo/jax/layers/spectrum_augmenter.py
Adding a spectrum augmenter layer based on lingvo spectrum augmenter layer: https://github.com/tensorflow/lingvo/blob/master/lingvo/jax/layers/spectrum_augmenter.py

This is an essential component for speech recognition models.
SpecAug masking process is described in https://arxiv.org/abs/1904.08779

PiperOrigin-RevId: 448155053

google/init2winit