Revise Log call to remove method that could cause exception.

Bug: 4368433
Test: Manual tests.
Change-Id: I1c5ba1a03ebe51b3b379c11b1a54a08ed64a46b4
diff --git a/wearable/wear/DataLayer/Wearable/src/main/java/com/example/android/wearable/datalayer/DataLayerListenerService.java b/wearable/wear/DataLayer/Wearable/src/main/java/com/example/android/wearable/datalayer/DataLayerListenerService.java
index d8f2cbe..b9539a3 100644
--- a/wearable/wear/DataLayer/Wearable/src/main/java/com/example/android/wearable/datalayer/DataLayerListenerService.java
+++ b/wearable/wear/DataLayer/Wearable/src/main/java/com/example/android/wearable/datalayer/DataLayerListenerService.java
@@ -69,7 +69,7 @@
                         if (task.isSuccessful()) {
                             Log.d(TAG, "Message sent successfully");
                         } else {
-                            Log.d(TAG, "Message failed: " + task.getResult());
+                            Log.d(TAG, "Message failed.");
                         }
                     }
                 });