Hide the workspace when launching AllApps2D.

Boosts performance and squashes some weird focus issues.

(Also: fix builds with AllApps3D)

Change-Id: Id1c4628e119c950dced9d3383993674f3d6b9a1c

src/com/android/launcher2/AllAppsView.java

@@ -51,6 +51,10 @@ import java.util.Comparator;
 
 
 public interface AllAppsView {
+    public interface Watcher {
+        public void zoomed(float zoom);
+    };
+
     public void setLauncher(Launcher launcher);
 
     public void setDragController(DragController dragger);