[automerger] Do not execute controller callbacks, if controller is null am: aa168d5c11 am: a4785c9a3f

Change-Id: I7445f1f572a0e07a5356f65c9abe65ca90fc7d52

quickstep/src/com/android/quickstep/RecentsAnimationWrapper.java

@@ -49,6 +49,9 @@ public class RecentsAnimationWrapper {
         this.mController = controller;
         this.targetSet = targetSet;
 
+        if (controller == null) {
+            return;
+        }
         if (mInputConsumerEnabled) {
             enableInputConsumer();
         }