Fixing random crash when transitioning to Recents, ensuring we don't update the TextView unnecessarily.

Change-Id: I93ab512642f6e95ee96e041614f063f46420bb39
diff --git a/packages/SystemUI/src/com/android/systemui/recents/views/TaskView.java b/packages/SystemUI/src/com/android/systemui/recents/views/TaskView.java
index 8f4f235..1ba0560 100644
--- a/packages/SystemUI/src/com/android/systemui/recents/views/TaskView.java
+++ b/packages/SystemUI/src/com/android/systemui/recents/views/TaskView.java
@@ -535,6 +535,15 @@
         }
     }
 
+    @Override
+    protected boolean drawChild(Canvas canvas, View child, long drawingTime) {
+        if (mIsStub && (child == mThumbnailView)) {
+            // Skip the thumbnail view if we are in stub mode
+            return false;
+        }
+        return super.drawChild(canvas, child, drawingTime);
+    }
+
     /**
      * Sets the focused task explicitly. We need a separate flag because requestFocus() won't happen
      * if the view is not currently visible, or we are in touch state (where we still want to keep