Some cleanup around drag and drop

 > Instead of resizing the rect for dragoutline in onDrow, store the resized rect itself
 > Remove unnecessary inverse matrix calculation

Change-Id: If13c3c5aaecba5a1d3a4f5d39199ed82e9662c62
diff --git a/src/com/android/launcher3/PagedView.java b/src/com/android/launcher3/PagedView.java
index 8769c99..7a142ad 100644
--- a/src/com/android/launcher3/PagedView.java
+++ b/src/com/android/launcher3/PagedView.java
@@ -179,7 +179,7 @@
     private Runnable mPostReorderingPreZoomInRunnable;
 
     // Convenience/caching
-    protected static final Matrix sTmpInvMatrix = new Matrix();
+    private static final Matrix sTmpInvMatrix = new Matrix();
     private static final float[] sTmpPoint = new float[2];
     private static final int[] sTmpIntPoint = new int[2];
     private static final Rect sTmpRect = new Rect();