Add a split line to the failure messages in crawler test for clarity

Test: Logging text change only.
Fix: 207008176
Change-Id: Iad6d4f117bfc779b5ebe27b1c273f5b0c1c3b5b7
Merged-In: Iad6d4f117bfc779b5ebe27b1c273f5b0c1c3b5b7
(cherry picked from commit 46cd176c7607c87e6155e3d7f7f6b3d27d27ac21)
diff --git a/harness/src/main/java/com/android/csuite/tests/AppCrawlTest.java b/harness/src/main/java/com/android/csuite/tests/AppCrawlTest.java
index 3e7216d..4d806fa 100644
--- a/harness/src/main/java/com/android/csuite/tests/AppCrawlTest.java
+++ b/harness/src/main/java/com/android/csuite/tests/AppCrawlTest.java
@@ -119,7 +119,8 @@
         if (!failureMessages.isEmpty()) {
             testFailed(
                     String.join(
-                            "\n\n", failureMessages.toArray(new String[failureMessages.size()])));
+                            "\n============\n",
+                            failureMessages.toArray(new String[failureMessages.size()])));
         }
     }