Merge "Canonicalize tz IDs when finding exemplar location" am: 5e603a4b

            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);