Canonicalize tz IDs when finding exemplar location

        if (preferLongName) {

            displayName = getZoneLongName(timeZoneNames, tz, now);

        } else {

            displayName = timeZoneNames.getExemplarLocationName(tz.getID());

            // Canonicalize the zone ID for ICU. It will only return valid strings for zone IDs

            // that match ICUs zone IDs (which are similar but not guaranteed the same as those

            // in timezones.xml). timezones.xml and related files uses the IANA IDs. ICU IDs are

            // stable and IANA IDs have changed over time so they have drifted.

            // See http://bugs.icu-project.org/trac/ticket/13070 / http://b/36469833.

            String canonicalZoneId = android.icu.util.TimeZone.getCanonicalID(tz.getID());

            if (canonicalZoneId == null) {

                canonicalZoneId = tz.getID();

            }

            displayName = timeZoneNames.getExemplarLocationName(canonicalZoneId);

            if (displayName == null || displayName.isEmpty()) {

                // getZoneExemplarLocation can return null. Fall back to the long name.

                displayName = getZoneLongName(timeZoneNames, tz, now);