Merge \"Unbreak Javadoc on getAttestationChallenge()\" into nyc-dev

     *

     * @see Builder#setAttestationChallenge(byte[])

     */

    /*

     * TODO(swillden): Update this documentation to describe the hardware and software root keys,

     * including information about CRL/OCSP services for discovering revocations, and to link to

     * documentation of the extension format and content.

     */

    public byte[] getAttestationChallenge() {

        return Utils.cloneIfNotNull(mAttestationChallenge);

    }