Add method to determine if Launcher is using vertical bars

Change-Id: I7e9096cf81b49d213025c6f98708186330448fc0

src/com/android/launcher3/Launcher.java

@@ -3953,6 +3953,11 @@ public class Launcher extends Activity
         return bounceAnim;
     }
 
+    public boolean useVerticalBarLayout() {
+        return LauncherAppState.getInstance().getDynamicGrid().
+                getDeviceProfile().isVerticalBarLayout();
+    }
+
     @Override
     public void bindSearchablesChanged() {
         boolean searchVisible = updateGlobalSearchIcon();