Only keep language and country in locale argument for connect page.

Author: jiuyangzhao

src/main/java/com/dropbox/core/android/AuthActivity.java

@@ -542,6 +542,7 @@ private void authFinished(Intent authResult) {
     private void startWebAuth(String state) {
         String path = "1/connect";
         Locale locale = Locale.getDefault();
+        locale = new Locale(locale.getLanguage(), locale.getCountry());
 
         // Web Auth currently does not support desiredUid and only one alreadyAuthUid (param n).
         // We use first alreadyAuthUid arbitrarily.