Merge "libprocessgroup: Reject JoinCgroup actions for v2 controllers" into...

Merge "libprocessgroup: Reject JoinCgroup actions for v2 controllers" into main am: c049af4e am: bc60d3d6 am: 87fd9265

Original change: https://android-review.googlesource.com/c/platform/system/core/+/2829576



Change-Id: If79c45dddab7a00008744b6d5ee926268cb96c24
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>