Clearer diag for visible keyguard

Test: presubmit
Bug: 179508881
Change-Id: I69f2e766701e77d927169b570d2dad0bf8d4c75a
diff --git a/tests/src/com/android/launcher3/ui/AbstractLauncherUiTest.java b/tests/src/com/android/launcher3/ui/AbstractLauncherUiTest.java
index d4e8f1f..e7e245f 100644
--- a/tests/src/com/android/launcher3/ui/AbstractLauncherUiTest.java
+++ b/tests/src/com/android/launcher3/ui/AbstractLauncherUiTest.java
@@ -250,7 +250,7 @@
 
     @Before
     public void setUp() throws Exception {
-        Assert.assertTrue("Keyguard is visible",
+        Assert.assertTrue("Keyguard is visible, which is likely caused by a crash in SysUI",
                 TestHelpers.wait(
                         Until.gone(By.res(SYSTEMUI_PACKAGE, "keyguard_status_view")), 60000));