fix build

Author: tylerbenson

java/sample-apps/okhttp/src/main/java/io/opentelemetry/lambda/sampleapps/okhttp/OkHttpRequestHandler.java

@@ -8,6 +8,7 @@
 import io.opentelemetry.instrumentation.okhttp.v3_0.OkHttpTelemetry;
 import java.io.IOException;
 import java.io.UncheckedIOException;
+import okhttp3.Call;
 import okhttp3.OkHttpClient;
 import okhttp3.Request;
 import okhttp3.Response;
@@ -24,15 +25,14 @@ public APIGatewayProxyResponseEvent handleRequest(
       APIGatewayProxyRequestEvent input, Context context) {
     logger.info("Serving lambda request.");
 
-    OkHttpClient client =
-        new OkHttpClient.Builder()
-            .addInterceptor(OkHttpTelemetry.create(GlobalOpenTelemetry.get()).newInterceptor())
-            .build();
+    OkHttpClient baseClient = new OkHttpClient();
+    Call.Factory callFactory =
+        OkHttpTelemetry.create(GlobalOpenTelemetry.get()).newCallFactory(baseClient);
 
     APIGatewayProxyResponseEvent response = new APIGatewayProxyResponseEvent();
 
     Request request = new Request.Builder().url("https://aws.amazon.com/").build();
-    try (Response okhttpResponse = client.newCall(request).execute()) {
+    try (Response okhttpResponse = callFactory.newCall(request).execute()) {
       response.setBody(
           "Hello lambda - fetched " + okhttpResponse.body().string().length() + " bytes.");
     } catch (IOException e) {