Revert "CTS tests for systemUserOnly manifest attribute" Revert submission 25631646-systemUserOnly_manifestAttribute Reason for revert: Likely culprit for b/319437162. Will be running through ABTD before submitting the revert. Reverted changes: /q/submissionid:25631646-systemUserOnly_manifestAttribute Change-Id: I6ca40608a91c0214cd6ac708bc52a7767abbfb45