fix json reading

Author: Skn0tt

playwright/src/main/java/com/microsoft/playwright/impl/BrowserContextImpl.java

@@ -104,10 +104,10 @@ enum EventType {
     clock = new ClockImpl(this);
     closePromise = new WaitableEvent<>(listeners, EventType.CLOSE); 
 
-    String url = initializer.getAsJsonObject("options").get("baseUrl").getAsString();
+    JsonElement url = initializer.getAsJsonObject("options").get("baseUrl");
     if (url != null) {
       try {
-        this.baseUrl = new URL(url);
+        this.baseUrl = new URL(url.getAsString());
       } catch (MalformedURLException e) {
       }
     }

playwright/src/test/java/com/microsoft/playwright/TestPageEmulateMedia.java

@@ -29,7 +29,6 @@
 import static com.microsoft.playwright.options.Media.PRINT;
 import static com.microsoft.playwright.Utils.attachFrame;
 import static org.junit.jupiter.api.Assertions.assertEquals;
-import static org.junit.jupiter.api.Assertions.assertTrue;
 
 public class TestPageEmulateMedia extends TestBase {
   @Test