Fix janky Alt+Tab through overview animation

Flag: not needed
Fixes: 282172884
Test: used alt+tab in overview; also launched overview through keyboard quick switch view
Change-Id: I3d1e54cda317ee8f8d2b2d698480cd3ca01dfc85
diff --git a/src/com/android/launcher3/PagedView.java b/src/com/android/launcher3/PagedView.java
index 5ce88a3..f355ae7 100644
--- a/src/com/android/launcher3/PagedView.java
+++ b/src/com/android/launcher3/PagedView.java
@@ -1573,7 +1573,9 @@
     @Override
     public void requestChildFocus(View child, View focused) {
         super.requestChildFocus(child, focused);
-
+        if (!shouldHandleRequestChildFocus()) {
+            return;
+        }
         // In case the device is controlled by a controller, mCurrentPage isn't updated properly
         // which results in incorrect navigation
         int nextPage = getNextPage();
@@ -1587,6 +1589,10 @@
         }
     }
 
+    protected boolean shouldHandleRequestChildFocus() {
+        return true;
+    }
+
     public int getDestinationPage() {
         return getDestinationPage(mOrientationHandler.getPrimaryScroll(this));
     }