Refine Radio HAL comments.

- Add potential error codes to some responses.
- Relax iccTransmitApduBasicChannel requirements on HAL.
- Add reference to LTE bandwidth validity spec.

Bug: 310710841
Test: N/A
Flag: EXEMPT no logic change
Change-Id: I446714b0f89df68377e4a5618b7c4dca59e89610