Merge "Adapt to libprocessgroup API changes for polling on cgroup.events" into main am: 50ebacbcc8 am: 6673f7a55c

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/2812833

Change-Id: I463ec84fde60426c044008ed1e4675dae9cf56e5
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>