Testing AudioDeviceInfo.getId()

Change-Id: Ied4d3af0534a910dd6a4282ea2a8c2dce1017d8f
diff --git a/tests/tests/media/src/android/media/cts/EnumDevicesTest.java b/tests/tests/media/src/android/media/cts/EnumDevicesTest.java
index 53dd5e6..85bd5e5 100644
--- a/tests/tests/media/src/android/media/cts/EnumDevicesTest.java
+++ b/tests/tests/media/src/android/media/cts/EnumDevicesTest.java
@@ -100,6 +100,10 @@
         deviceList = mAudioManager.getDevices(AudioManager.GET_DEVICES_ALL);
         for (int index = 0; index < deviceList.length; index++) {
             AudioDeviceInfo deviceInfo = deviceList[index];
+
+            // we don't say anything about the returned value.
+            int id = deviceInfo.getId();
+
             // Product Name
             CharSequence productName = deviceInfo.getProductName();
             assertNotNull(productName);