[java] fix autoclose casting

java.lang.ClassCastException: class jdk.internal.net.http.HttpClientFacade cannot be cast to class java.lang.AutoCloseable (jdk.internal.net.http.HttpClientFacade is in module java.net.http of loader 'platform'; java.lang.AutoCloseable is in module java.base of loader 'bootstrap'

Author: p0deje

java/spotbugs-excludes.xml

@@ -244,4 +244,9 @@
     <Bug pattern="NP_NULL_ON_SOME_PATH_FROM_RETURN_VALUE,IS2_INCONSISTENT_SYNC"/>
   </Match>
 
+  <Match>
+    <Class name="org.openqa.selenium.remote.http.jdk.JdkHttpClient"/>
+    <Bug pattern="BC_VACUOUS_INSTANCEOF"/>
+  </Match>
+
 </FindBugsFilter>

java/src/org/openqa/selenium/remote/http/jdk/JdkHttpClient.java

@@ -523,15 +523,17 @@ public void close() {
       }
     }
 
-    AutoCloseable closeable = (AutoCloseable) this.client;
-    executorService.submit(
-        () -> {
-          try {
-            closeable.close();
-          } catch (Exception e) {
-            LOG.log(Level.WARNING, "failed to close the http client: " + closeable, e);
-          }
-        });
+    if (this.client instanceof AutoCloseable) {
+      AutoCloseable closeable = (AutoCloseable) this.client;
+      executorService.submit(
+          () -> {
+            try {
+              closeable.close();
+            } catch (Exception e) {
+              LOG.log(Level.WARNING, "failed to close the http client: " + closeable, e);
+            }
+          });
+    }
     this.client = null;
     executorService.shutdown();
   }