getCredentialKeyCertificateChain
Gets the X.509 certificate chain for the CredentialKey which identifies this credential to the issuing authority. This is the same certificate chain that was returned by getCredentialKeyCertificateChain when the credential was first created and its Android Keystore extension will contain the challenge
data set at that time. See the documentation for that method for important information about this certificate chain.
Return
the certificate chain for this credential's CredentialKey.