8325189: Enable this-escape javac warning in java.base

Reviewed-by: alanb, erikj, naoto, smarks, ihse, joehw, lancea, weijun

src/java.base/share/classes/java/net/ServerSocket.java

@@ -266,6 +266,7 @@ public class ServerSocket implements java.io.Closeable {
      * @see SecurityManager#checkListen
      * @since   1.1
      */
+    @SuppressWarnings("this-escape")
     public ServerSocket(int port, int backlog, InetAddress bindAddr) throws IOException {
         if (port < 0 || port > 0xFFFF)
             throw new IllegalArgumentException("Port value out of range: " + port);