Use new DeviceConfig.SYNC_DISABLED_MODE_* constants

The constants were refactored from Settings.Config (as hidden APIs) into DeviceConfig (as System APIs).

Bug: 271870457
Test: presubmit
Change-Id: I21e3461824c442e26ee94a3587355b887aee02a3
Merged-In: Ic67325e383eaf36c66b73efbefb7784619294d78
2 files changed