Revert "libprocessgroup: Remove dependency on libcgrouprc"

Revert submission 3212512

Reason for revert: Droidmonitor created revert due to b/372273614. Will be verifying through ABTD before submission.

Reverted changes: /q/submissionid:3212512

Change-Id: I15c7763467cd9f65d4b389b2d4ccaff92012f21f