Add new features to tf.contrib.signal.frames:

- Support arbitrary rank tensors.
- Add an `axis` parameter for framing any axis.
- Add a `pad_end` and `pad_value` parameter for controlling the signal padding. Padding is disabled by default to avoid a copy of a potentially large Tensor.
- Support shape inference of resulting framed tensor.
- Expand the tests, including tests for the gradients.
- Since `frames` is a noun and not a verb, rename `frames` to `frame`.

PiperOrigin-RevId: 161998921