Merge "NetworkScoreManager: Address review comment"

     *

     * @return A new {@link NetworkKey} instance or <code>null</code> if the given

     *         {@link ScanResult} instance is malformed.

     * @throws IllegalArgumentException

     * @throws NullPointerException

     */

    @Nullable

    public static NetworkKey createFromScanResult(@NonNull ScanResult result) {

        if (result == null) {

            throw new IllegalArgumentException("ScanResult cannot be null");

        }

        Objects.requireNonNull(result);

        final String ssid = result.SSID;

        if (TextUtils.isEmpty(ssid) || ssid.equals(WifiManager.UNKNOWN_SSID)) {

            return null;