The captured Android 429 and 448 flows report errors: [-1013] for keystore
(an emulator cannot sign with the device keystore) and errors: [-3] for
Play Integrity, with empty signed_nonce / key_hash / integrity_token.
Those defaults are part of the format, not caller policy.
Serialize an attestation header value.
The captured Android 429 and 448 flows report
errors: [-1013]for keystore (an emulator cannot sign with the device keystore) anderrors: [-3]for Play Integrity, with emptysigned_nonce/key_hash/integrity_token. Those defaults are part of the format, not caller policy.