Replace `Proxy.getProxyClass()` with `Proxy.newProxyInstance().getClass`

 * @deprecated Proxy classes generated in a named module are encapsulated
 *      and not accessible to code outside its module.
 *      {@link Constructor#newInstance(Object...) Constructor.newInstance}
 *      will throw {@code IllegalAccessException} when it is called on
 *      an inaccessible proxy class.
 *      Use {@link #newProxyInstance(ClassLoader, Class[], InvocationHandler)}
 *      to create a proxy instance instead.
 *
 * @see <a href="#membership">Package and Module Membership of Proxy Class</a>
 * @revised 9
 */
@Deprecated
@CallerSensitive
public static Class<?> getProxyClass(ClassLoader loader,
                                     Class<?>... interfaces)
    throws IllegalArgumentException