Revert^3 "libprocessgroup: uid/pid hierarchy for cgroup v2"

a1a04979844173be24e6a239a1e0d6272cd20166

Bug: 151660495
Test: verified proper boot in regular mode and proper working of adb in
recovery

Change-Id: I1276796e982fee932cdea7eb145f20b3f1b3463d
3 files changed