8193128: Reduce number of implementation classes returned by List/Set/Map.of()

8191418: List.of().indexOf(null) doesn't throw NullPointerException

Reviewed-by: smarks, jrose, martin, plevart

src/java.base/share/classes/java/util/AbstractSet.java

@@ -93,9 +93,7 @@ public abstract class AbstractSet<E> extends AbstractCollection<E> implements Se
             return false;
         try {
             return containsAll(c);
-        } catch (ClassCastException unused)   {
-            return false;
-        } catch (NullPointerException unused) {
+        } catch (ClassCastException | NullPointerException unused) {
             return false;
         }
     }