[java] Add null check before returning isDisplayed value (#9299)

* [java] Add null check before returning isDisplayed value

* Update java/client/src/org/openqa/selenium/remote/RemoteWebElement.java

Co-authored-by: Diego Molina <[email protected]>

Author: pujagani

java/client/src/org/openqa/selenium/remote/RemoteWebElement.java

@@ -295,6 +295,10 @@ public boolean isDisplayed() {
     Object value = execute(DriverCommand.IS_ELEMENT_DISPLAYED(id))
       .getValue();
     try {
+      // See https://github.com/SeleniumHQ/selenium/issues/9266
+      if (value == null) {
+        return false;
+      }
       return (Boolean) value;
     } catch (ClassCastException ex) {
       throw new WebDriverException("Returned value cannot be converted to Boolean: " + value, ex);