Summary
-------
Add a convenience predicate to `javax.lang.model.util.Elements` to test for automatic modules.

Problem
-------

No API in `javax.lang.model` to determine of a module is automatic or not.

Solution
--------

Add a method providing the functionality in question.

Specification
-------------
New method added to `javax.lang.model.util.Elements`:

    /**
     * {@return {@code true} if the module element is an automatic
     * module, {@code false} otherwise}
     *
     * @implSpec
     * The default implementation of this method returns {@code
     * false}.
     *
     * @param module the module element being examined
     * @jls 7.7.1 Dependences
     * @since 17
     */
    default boolean isAutomaticModule(ModuleElement module)