Mark Serbian in Latin script as non-localized [DO NOT MERGE]

Serbian in Latin script is only partially localized in Android N. We
should not show it as localized in either Setup Wizard or Settings.

Bug: 29460424
Change-Id: I6829a89c49c1b5e8768b1527daa3aa9508deb491

core/java/com/android/internal/app/LocaleStore.java

@@ -307,6 +307,9 @@ public class LocaleStore {
             localizedLocales.add(li.getLangScriptKey());
         }
 
+        // Serbian in Latin script is only partially localized in N.
+        localizedLocales.remove("sr-Latn");
+
         for (LocaleInfo li : sLocaleCache.values()) {
             li.setTranslated(localizedLocales.contains(li.getLangScriptKey()));
         }