Merge "ID attestation: update docs for a second IMEI"

     * straightforward translation of the KeyMint tag/value parameter lists to ASN.1.

     *

     * KeyDescription ::= SEQUENCE {

     *     attestationVersion         INTEGER, # Value 200

     *     attestationVersion         INTEGER, # Value 300

     *     attestationSecurityLevel   SecurityLevel, # See below

     *     keyMintVersion             INTEGER, # Value 200

     *     keyMintVersion             INTEGER, # Value 300

     *     keymintSecurityLevel       SecurityLevel, # See below

     *     attestationChallenge       OCTET_STRING, # Tag::ATTESTATION_CHALLENGE from attestParams

     *     uniqueId                   OCTET_STRING, # Empty unless key has Tag::INCLUDE_UNIQUE_ID

     *     vendorPatchLevel           [718] EXPLICIT INTEGER OPTIONAL,

     *     bootPatchLevel             [719] EXPLICIT INTEGER OPTIONAL,

     *     deviceUniqueAttestation    [720] EXPLICIT NULL OPTIONAL,

     *     attestationIdSecondImei    [723] EXPLICIT OCTET_STRING OPTIONAL,

     * }

     */

    Certificate[] certificateChain;