Added config_springLoadWorkspace to enable/disable spring-loaded workspace.

- Added side hints back
- Only scale down icons if spring-loaded
- Only show App Info drop target if spring-loaded

Change-Id: I4b0dddccbe0e80b7ceb6b7266fc527f757744148

src/com/android/launcher3/allapps/AllAppsContainerView.java

@@ -494,6 +494,8 @@ public class AllAppsContainerView extends BaseContainerView implements DragSourc
 
         // Start the drag
         mLauncher.getWorkspace().beginDragShared(v, mIconLastTouchPos, this, false);
+        // Enter spring loaded mode
+        mLauncher.enterSpringLoadedDragMode();
 
         return false;
     }