Merge "Introduce security.lower_kptr_restrict property" am: 24a21867e7 am: 8ff9efc482 am: 47319cec95 am: 4d52531ed6

Original change: https://android-review.googlesource.com/c/platform/system/core/+/1455185

Change-Id: I95a58be58d993ddc6bfe101075cf737b444a0aad