Allow vendor_init to do cgroup migration am: c954e7c50b am: 485df3df21 am: 4c41d225f0

Original change: https://googleplex-android-review.googlesource.com/c/platform/hardware/google/pixel-sepolicy/+/15105325

Change-Id: I95b99103f8aa226c34adeb420051c622f0dc529a