Merge "clatd: use offsetof" am: b8c834410e

Original change: https://android-review.googlesource.com/c/platform/external/android-clat/+/2491938

Change-Id: I0932a11dbd451aacc5096e9b175c6c79e157f341
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>