Sort synced user folders on top

app/src/main/java/eu/faircode/email/AdapterFolder.java

@@ -148,16 +148,14 @@ public class AdapterFolder extends RecyclerView.Adapter<AdapterFolder.ViewHolder
             public int compare(TupleFolderEx f1, TupleFolderEx f2) {
                 int s = ((Integer) EntityFolder.FOLDER_SORT_ORDER.indexOf(f1.type))
                         .compareTo(EntityFolder.FOLDER_SORT_ORDER.indexOf(f2.type));
-                if (s == 0) {
-                    int a = collator.compare(
-                            f1.accountName == null ? "" : f1.accountName,
-                            f2.accountName == null ? "" : f2.accountName);
-                    if (a == 0)
-                        return collator.compare(f1.name, f2.name);
-                    else
-                        return a;
-                } else
+                if (s != 0)
                     return s;
+                int c = -f1.synchronize.compareTo(f2.synchronize);
+                if (c != 0)
+                    return c;
+                return collator.compare(
+                        f1.name == null ? "" : f1.name,
+                        f2.name == null ? "" : f2.name);
             }
         });