Revert "Add permissions to FeatureFlagService and override api."

Revert submission 23727772-b279054964-flag-api-udc-qpr-dev

Reason for revert: b/290929382

Reverted changes: /q/submissionid:23727772-b279054964-flag-api-udc-qpr-dev

Change-Id: I2148317cb3aa35403a7d4df4e2b0db18aca1d91b
13 files changed