title: Robolectric: How to specify the locale to en-US or fr to test string formatting?
body: <p>In a test, we want to test string formatting in English and French. How to specify the locale in robolectric?</p>
  
  <p>The method in this post doesn't work:
  <a href="https://stackoverflow.com/questions/2900023/change-language-programatically-in-android">Change language programmatically in Android</a></p>