title: How I can get available timezones (android:settings)
body: <p>I want to get <strong>TimeZones</strong>, that I can see in settings: <strong>Date and Time</strong> --></p>
  
  <p><img src="https://lh4.googleusercontent.com/-RW7z8-VTXx8/UNyKwfxVkXI/AAAAAAAAAQc/YhhCLrxlL_g/s1280/2012-12-27_android_settings_date_timezones.png" alt="Select time zone"></p>
  
  <p>Yes, I know, that in java/android can get all timezones by <code>TimeZone.getAvailableIDs()</code>, but I want get only timezones, that exists on</p>
  
  <p><img src="https://lh4.googleusercontent.com/-RW7z8-VTXx8/UNyKwfxVkXI/AAAAAAAAAQc/YhhCLrxlL_g/s1280/2012-12-27_android_settings_date_timezones.png" alt="settings screen">.</p>