Animate RecentsView when rotating in fake orientations

Test: Manual - animations
Bug: 336704871
Flag: EXEMPT bugfix
Change-Id: I80629128a0730ca85d0313d15af806ddf840e82b
diff --git a/quickstep/src/com/android/quickstep/views/RecentsView.java b/quickstep/src/com/android/quickstep/views/RecentsView.java
index 4804e56..c89b6b8 100644
--- a/quickstep/src/com/android/quickstep/views/RecentsView.java
+++ b/quickstep/src/com/android/quickstep/views/RecentsView.java
@@ -2675,17 +2675,9 @@
         pa.start();
     }
 
-    public AnimatorSet setRecentsChangedOrientation(boolean fadeInChildren) {
-        getRunningTaskIndex();
-        int runningIndex = getCurrentPage();
+    public AnimatorSet setRecentsChangedOrientation(boolean fadeOut) {
         AnimatorSet as = new AnimatorSet();
-        for (int i = 0; i < getTaskViewCount(); i++) {
-            View taskView = requireTaskViewAt(i);
-            if (runningIndex == i && taskView.getAlpha() != 0) {
-                continue;
-            }
-            as.play(ObjectAnimator.ofFloat(taskView, View.ALPHA, fadeInChildren ? 0 : 1));
-        }
+        as.play(ObjectAnimator.ofFloat(this, View.ALPHA, fadeOut ? 0 : 1));
         return as;
     }