Merge "libprocessgroup: memcg v2 default MaxActivationDepth = 3" into main am: 81abbe1490

Original change: https://android-review.googlesource.com/c/platform/system/core/+/3554610

Change-Id: Id0fbbf9e94f8c77aee9aa2917162e69962860fcc
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>