Fix proguard flag

-> widget resize frame animations are broken

Change-Id: I138b29d7d99f80462985f9e2445048b3ab690e18
diff --git a/proguard.flags b/proguard.flags
index cac8930..086337d 100644
--- a/proguard.flags
+++ b/proguard.flags
@@ -39,7 +39,7 @@
   public int getY();
 }
 
--keep class com.android.launcher3.dragndrop.DragLayer$LayoutParams {
+-keep class com.android.launcher3.views.BaseDragLayer$LayoutParams {
   public void setWidth(int);
   public int getWidth();
   public void setHeight(int);