Show resize frame when widget is added.

I referenced the code in Workspace.java that updates the widget view's
layout params before showing the resize frame.

Test: manual, AddWidgetTest and AddConfigWidgetTest tapl tests
Bug: 183437963
Change-Id: I6655917878fa22d6084b4bf39fc0661e7278d6f9

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

@@ -58,6 +58,8 @@ public class AddWidgetTest extends AbstractLauncherUiTest {
                 openAllWidgets().
                 getWidget(widgetInfo.getLabel(mTargetContext.getPackageManager())).
                 dragToWorkspace(false, false);
+        // Dismiss widget resize frame.
+        mDevice.pressHome();
 
         assertTrue(mActivityMonitor.itemExists(
                 (info, view) -> info instanceof LauncherAppWidgetInfo &&