Update ShortcutBadger

Fixes #6069
// FREEBIE

src/org/thoughtcrime/securesms/notifications/MessageNotifier.java

@@ -500,7 +500,8 @@ public class MessageNotifier {
 
   private static void updateBadge(Context context, int count) {
     try {
-      ShortcutBadger.setBadge(context.getApplicationContext(), count);
+      if (count == 0) ShortcutBadger.removeCount(context);
+      else            ShortcutBadger.applyCount(context, count);
     } catch (Throwable t) {
       // NOTE :: I don't totally trust this thing, so I'm catching
       // everything.