Merge "Also mount /sys/fs/selinux" am: d9154a7aa2 am: dd042a2af9

Original change: https://android-review.googlesource.com/c/platform/frameworks/native/+/2628122

Change-Id: I75a6aa559f8f6c54cf3a36c3faa872486e9ba8a4
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>