Add test for widget picker on landscape mode for tablets

When we added widget picker two pane layout, it broke some tests with the flag on. Here we fix those tests.
Bug: 256684299
Test: AddWidgetsTest and TaplTestsLauncher3#testWidget

Change-Id: I383c754016d82fba51fa0b7b0459cd7e83b274d8

tests/src/com/android/launcher3/ui/widget/AddWidgetTest.java

@@ -60,11 +60,11 @@ public class AddWidgetTest extends AbstractLauncherUiTest {
         final LauncherAppWidgetProviderInfo widgetInfo =
                 TestViewHelpers.findWidgetProvider(this, false /* hasConfigureScreen */);
 
-        WidgetResizeFrame resizeFrame = mLauncher.
-                getWorkspace().
-                openAllWidgets().
-                getWidget(widgetInfo.getLabel(mTargetContext.getPackageManager())).
-                dragWidgetToWorkspace();
+        WidgetResizeFrame resizeFrame = mLauncher
+                .getWorkspace()
+                .openAllWidgets()
+                .getWidget(widgetInfo.getLabel(mTargetContext.getPackageManager()))
+                .dragWidgetToWorkspace();
 
         assertTrue(mActivityMonitor.itemExists(
                 (info, view) -> info instanceof LauncherAppWidgetInfo &&