add metrics for describe activity error path test

Author: yiyuan-he

appsignals-tests/contract-tests/src/test/java/software/amazon/opentelemetry/appsignals/test/awssdk/base/AwsSdkBaseTest.java

@@ -2484,5 +2484,38 @@ protected void doTestStepFunctionsDescribeActivityError() throws Exception {
         List.of(
             assertAttribute(
                 SemanticConventionsConstants.AWS_ACTIVITY_ARN, "arn:aws:states:us-west-2:000000000000:activity:nonexistent-activity")));
+    assertMetricClientAttributes(
+        metrics,
+        AppSignalsConstants.LATENCY_METRIC,
+        localService,
+        localOperation,
+        getStepFunctionsServiceName(),
+        "DescribeActivity",
+        type,
+        identifier,
+        cloudformationIdentifier,
+        5000.0);
+    assertMetricClientAttributes(
+        metrics,
+        AppSignalsConstants.FAULT_METRIC,
+        localService,
+        localOperation,
+        getStepFunctionsServiceName(),
+        "DescribeActivity",
+        type,
+        identifier,
+        cloudformationIdentifier,
+        0.0);
+    assertMetricClientAttributes(
+        metrics,
+        AppSignalsConstants.ERROR_METRIC,
+        localService,
+        localOperation,
+        getStepFunctionsServiceName(),
+        "DescribeActivity",
+        type,
+        identifier,
+        cloudformationIdentifier,
+        1.0);
   }
 }