Merge "Improving TAPL messaging" into sc-dev am: 9a6ba8cfa4

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/14669955

Change-Id: I5f77a773dffc3d6731fd1d6d2e12c0c7e1abda0e
diff --git a/tests/tapl/com/android/launcher3/tapl/LauncherInstrumentation.java b/tests/tapl/com/android/launcher3/tapl/LauncherInstrumentation.java
index 57f40db..4cf52f0 100644
--- a/tests/tapl/com/android/launcher3/tapl/LauncherInstrumentation.java
+++ b/tests/tapl/com/android/launcher3/tapl/LauncherInstrumentation.java
@@ -496,13 +496,14 @@
     private void fail(String message) {
         checkForAnomaly();
         Assert.fail(formatSystemHealthMessage(formatErrorWithEvents(
-                "http://go/tapl test failure:\nOverview: " + getContextDescription()
+                "http://go/tapl test failure:\nSummary: " + getContextDescription()
                         + " - visible state is " + getVisibleStateMessage()
                         + ";\nDetails: " + message, true)));
     }
 
     private String getContextDescription() {
-        return mDiagnosticContext.isEmpty() ? "" : String.join(", ", mDiagnosticContext);
+        return mDiagnosticContext.isEmpty()
+                ? "(no context)" : String.join(", ", mDiagnosticContext);
     }
 
     void assertTrue(String message, boolean condition) {