Snap for 5039702 from 1c022d77519e1b25a0e6e6100d743255e83d3021 to qt-release

Change-Id: I470d10cd154f4328cc2ba78dcb484df492b50c29
diff --git a/quickstep/src/com/android/quickstep/util/ClipAnimationHelper.java b/quickstep/src/com/android/quickstep/util/ClipAnimationHelper.java
index 8aaa40c..711ef58 100644
--- a/quickstep/src/com/android/quickstep/util/ClipAnimationHelper.java
+++ b/quickstep/src/com/android/quickstep/util/ClipAnimationHelper.java
@@ -181,6 +181,8 @@
                 }
 
                 alpha = mTaskAlphaCallback.apply(app, alpha);
+            } else {
+                crop = null;
             }
 
             params[i] = new SurfaceParams(app.leash, alpha, mTmpMatrix, crop,