Merge "init: Add --only-if-running argument to restart command." am: 8189339de3 am: 3a9fc6ea0a am: fc8282c865

Original change: https://android-review.googlesource.com/c/platform/system/core/+/1910536

Change-Id: Ic04db060c83c943c61b5520aace4d5c17f31f2b2