Revert "Reverting refactoring of Folder and FolderIcon to avoid dependencies breakage"

This reverts commit fc956e5a2a818c06ed3424e15b0aa20a3f604658.

Change-Id: Ib3b5156b8fc3cad35c4634d61d5390c848ce1f93
diff --git a/src/com/android/launcher3/Launcher.java b/src/com/android/launcher3/Launcher.java
index 7b53f9f..406a6f5 100644
--- a/src/com/android/launcher3/Launcher.java
+++ b/src/com/android/launcher3/Launcher.java
@@ -107,6 +107,8 @@
 import com.android.launcher3.dragndrop.DragController;
 import com.android.launcher3.dragndrop.DragLayer;
 import com.android.launcher3.dragndrop.DragView;
+import com.android.launcher3.folder.Folder;
+import com.android.launcher3.folder.FolderIcon;
 import com.android.launcher3.model.WidgetsModel;
 import com.android.launcher3.userevent.Logger;
 import com.android.launcher3.util.ComponentKey;