Revert "libprocessgroup: Combine all 3 ActivateControllers imple..."

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: I3dadc0b7bccfe28bb067a93df2acf2c3ea0f9920
6 files changed