Merge "init: 'user root' check use vendor API" into main am: 0b64326377 am: ee8cbde0d5

Original change: https://android-review.googlesource.com/c/platform/system/core/+/3106173

Change-Id: I893dea55ae90d0c62f8fe05d38cfe66d7b97d4a7
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>