Updating landscape layout for launcher/quickstep

> Hotseat is tied to navbar (on left in seascape)
> Search box shows up in Overview (clicking it would crash for now)
> All-apps is no longer fullscreen in landscape
> Recents cards are appropriately scaled down
> Hotseat is visible in Overview

Bug: 70179916
Change-Id: I53149eaeac9557e8a01021b7e2d139f3d6ceef37

src/com/android/launcher3/CellLayout.java

@@ -847,10 +847,6 @@ public class CellLayout extends ViewGroup implements BubbleTextShadowHandler {
         return super.verifyDrawable(who) || (who == mBackground);
     }
 
-    public void setShortcutAndWidgetAlpha(float alpha) {
-        mShortcutsAndWidgets.setAlpha(alpha);
-    }
-
     public ShortcutAndWidgetContainer getShortcutsAndWidgets() {
         return mShortcutsAndWidgets;
     }