[java] fix null issue in deprecated method

Author: titusfortner

java/src/org/openqa/selenium/chrome/ChromeDriverService.java

@@ -158,8 +158,10 @@ public static ChromeDriverService createDefaultService() {
    */
   @Deprecated
   public static ChromeDriverService createServiceWithConfig(ChromeOptions options) {
+    ChromeDriverLogLevel oldLevel = options.getLogLevel();
+    ChromiumDriverLogLevel level = (oldLevel == null) ? null : ChromiumDriverLogLevel.fromString(oldLevel.toString());
     return new Builder()
-      .withLogLevel(ChromiumDriverLogLevel.fromString(options.getLogLevel().toString()))
+      .withLogLevel(level)
       .build();
   }