am ecdf20d4: Merge "Fix NPE in DateFormat.is24HourFormat."

     */

    public static Formatter formatDateRange(Context context, Formatter formatter, long startMillis,

                                            long endMillis, int flags, String timeZone) {

        // icu4c will fall back to the locale's preferred 12/24 format,

        // If we're being asked to format a time without being explicitly told whether to use

        // the 12- or 24-hour clock, icu4c will fall back to the locale's preferred 12/24 format,

        // but we want to fall back to the user's preference.

        if ((flags & (FORMAT_12HOUR | FORMAT_24HOUR)) == 0) {

        if ((flags & (FORMAT_SHOW_TIME | FORMAT_12HOUR | FORMAT_24HOUR)) == FORMAT_SHOW_TIME) {

            flags |= DateFormat.is24HourFormat(context) ? FORMAT_24HOUR : FORMAT_12HOUR;

        }