Add documentation for possible AndroidKeyStore exceptions to authenticate() call

     * @param flags optional flags; should be 0

     * @param callback an object to receive authentication events

     * @param handler an optional handler to handle callback events

     *

     * @throws IllegalArgumentException if the crypto operation is not supported or is not backed

     *         by <a href="{@docRoot}training/articles/keystore.html">Android Keystore

     *         facility</a>.

     * @throws IllegalStateException if the crypto primitive is not initialized.

     */

    @RequiresPermission(USE_FINGERPRINT)

    public void authenticate(@Nullable CryptoObject crypto, @Nullable CancellationSignal cancel,