Update the CTS tests to avoid failure on narrow screen.

bug:6407647:

Change-Id: Ief1c2caded396c2cbbb41a7a692865c920b6fa42
diff --git a/tests/tests/accessibilityservice/res/layout/accessibility_view_tree_reporting_test.xml b/tests/tests/accessibilityservice/res/layout/accessibility_view_tree_reporting_test.xml
index cd2f0c7..bd18a84 100644
--- a/tests/tests/accessibilityservice/res/layout/accessibility_view_tree_reporting_test.xml
+++ b/tests/tests/accessibilityservice/res/layout/accessibility_view_tree_reporting_test.xml
@@ -3,7 +3,7 @@
     android:id="@+id/rootLinearLayout"
     android:layout_width="fill_parent"
     android:layout_height="fill_parent"
-    android:orientation="horizontal"
+    android:orientation="vertical"
     android:layoutDirection="rtl"
     android:importantForAccessibility="yes"
     android:contentDescription="@string/rootLinearLayout">