Merge "Build first-stage init in Soong" am: 9e22a46db9 am: b8eed6199c am: 844eaae056

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

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I2d1fa78344f72783d447479176cd2503e6c50792