Get all Timezone IDs

TimezoneHelper.java

        StringBuilder sb = new StringBuilder("---------------");
        sb.append("Count = ");
        sb.append(TimeZone.getAvailableIDs().length);
        sb.append("\n");
        Log.i("Time", sb.toString());

        for (String timezoneId : TimeZone.getAvailableIDs()) {
            sb.replace(0, sb.length()-1, timezoneId);
            Log.i("Time", sb.toString() + "\n");
        }
        Log.i("Time", "---------------");