Add missing header and replace use of old ABSL alias.
Add missing header and replace use of old ABSL alias.

PiperOrigin-RevId: 274185271

iree-org/iree,iree-org/iree,google/iree,google/iree,google/iree,iree-org/iree,google/iree,iree-org/iree,iree-org/iree,google/iree,google/iree,iree-org/iree,iree-org/iree,google/iree