Merge "init: enable 'user root' check at build time" into main am: e767a711 am: 1fe09c73

Original change: https://android-review.googlesource.com/c/platform/system/core/+/3092789



Change-Id: Ibd2059c641e536be437e3e438835614d05018f33
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>