Merge "init: add a swapoff built-in command" into main am: b9f6c12b4d

Original change: https://android-review.googlesource.com/c/platform/system/core/+/3257011

Change-Id: I32752a9aa9884a7e3b52085da9cf9596c494daa0
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>