Merge "[CDM] Check for system calling UID when backing up and restoring data" into main

        @Override

        public byte[] getBackupPayload(int userId) {

            if (getCallingUid() != SYSTEM_UID) {

                throw new SecurityException("Caller must be system");

            }

            return mBackupRestoreProcessor.getBackupPayload(userId);

        }

        @Override

        public void applyRestoredPayload(byte[] payload, int userId) {

            if (getCallingUid() != SYSTEM_UID) {

                throw new SecurityException("Caller must be system");

            }

            mBackupRestoreProcessor.applyRestoredPayload(payload, userId);

        }