8042244: Re-examine the supportedness of non-SE org.w3c.dom.** API

Reviewed-by: mchung, alanb, lancea

modules.xml

@@ -1843,6 +1843,23 @@
       <to>jdk.xml.ws</to>
     </export>
   </module>
+  <module>
+    <name>jdk.xml.dom</name>
+    <depend>java.base</depend>
+    <depend re-exports="true">java.xml</depend>
+    <export>
+      <name>org.w3c.dom.css</name>
+    </export>
+    <export>
+      <name>org.w3c.dom.html</name>
+    </export>
+    <export>
+      <name>org.w3c.dom.stylesheets</name>
+    </export>
+    <export>
+      <name>org.w3c.dom.xpath</name>
+    </export>
+  </module>
   <module>
     <name>jdk.xml.ws</name>
     <depend>java.base</depend>