Merge "Build first-stage init in Soong" am: 9e22a46db9 am: b8eed6199c

Original change: https://android-review.googlesource.com/c/platform/system/core/+/1588294

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: Ifa81eb2609fdf1b16783c06c5762e6bf97593a92