KernelUtils.h - add arch query helpers am: 3e193f27ba am: dc723b1488

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/libs/net/+/23391171

Change-Id: I3cb8b6b1fb49dfa1380140a2aa6e632685f1e482
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>