unlockedDeviceRequired
Unlocked device required flag.
Corresponds to the Tag::UNLOCKED_DEVICE_REQUIRED authorization tag, which uses a tag ID value of 509.
ASN.1: unlockedDeviceRequired [509] EXPLICIT NULL OPTIONAL. Present in key attestation versions 3, 4, 100, 200, 300, 400.
Note: in this API, presence/absence of this field is represented by null vs non-null. See UnlockedDeviceRequired.explicitTag.