Add two proxy methods in code-gen template

Author: xiwhuang

python/rpdk/java/templates/init/guided_aws/AbstractTestBase.java

@@ -4,8 +4,10 @@
 import java.util.function.Function;
 import software.amazon.awssdk.awscore.AwsRequest;
 import software.amazon.awssdk.awscore.AwsResponse;
-import software.amazon.awssdk.core.SdkClient;
+import software.amazon.awssdk.core.ResponseBytes;
+import software.amazon.awssdk.core.ResponseInputStream;
 import software.amazon.awssdk.core.pagination.sync.SdkIterable;
+import software.amazon.awssdk.services.cloudformation.CloudFormationClient;
 import software.amazon.cloudformation.proxy.AmazonWebServicesClientProxy;
 import software.amazon.cloudformation.proxy.Credentials;
 import software.amazon.cloudformation.proxy.LoggerProxy;
@@ -43,6 +45,18 @@ static ProxyClient<SdkClient> MOCK_PROXY(
         return proxy.injectCredentialsAndInvokeIterableV2(request, requestFunction);
       }
 
+      @Override
+      public <RequestT extends AwsRequest, ResponseT extends AwsResponse> ResponseInputStream<ResponseT>
+      injectCredentialsAndInvokeV2InputStream(RequestT requestT, Function<RequestT, ResponseInputStream<ResponseT>> function) {
+        throw new UnsupportedOperationException();
+      }
+
+      @Override
+      public <RequestT extends AwsRequest, ResponseT extends AwsResponse> ResponseBytes<ResponseT>
+      injectCredentialsAndInvokeV2Bytes(RequestT requestT, Function<RequestT, ResponseBytes<ResponseT>> function) {
+        throw new UnsupportedOperationException();
+      }
+
       @Override
       public SdkClient client() {
         return sdkClient;