libprocessgroup_setup: use libcgrouprc_format

Use CgroupController definition from libcgrouprc_format, not
libprocessgroup, because the wire format will be removed
from libprocessgroup later.

Bug: 123664216
Test: builds
Change-Id: If5e2301a1b65c3f6a51a1661cfeeed4e299f634e
Merged-In: If5e2301a1b65c3f6a51a1661cfeeed4e299f634e
4 files changed