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

Merge "libprocessgroup: Reject JoinCgroup actions for v2 controllers" into main am: c049af4e am: c497737d am: 2686319f

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



Change-Id: I04f798a5c0d52d60de765e3578e7fcb12bba547e
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>