Merge "init: introduce ro.kernel.version property" am: 939353e1 am:...

Merge "init: introduce ro.kernel.version property" am: 939353e1 am: 30b3cb13 am: 750ca56a am: 18f97973

Original change: https://android-review.googlesource.com/c/platform/system/core/+/1840075

Change-Id: Ide868e14092c9660207d344bedc567a8950cb2c2