Create new window for Taskbar Nav Buttons when taskbar is focusable

Test: Open folder from taskbar, edit name, ensure back button displays above IME and that IME sends input to the taskbar folder name
Bug: 205803170
Change-Id: I36f6cfb835aa7da280f15ea4b0aed8923ce8a012
diff --git a/src/com/android/launcher3/Utilities.java b/src/com/android/launcher3/Utilities.java
index ac194d2..5bcc2ad 100644
--- a/src/com/android/launcher3/Utilities.java
+++ b/src/com/android/launcher3/Utilities.java
@@ -228,7 +228,7 @@
             offsetPoints(coord, v.getLeft(), v.getTop());
             scale *= v.getScaleX();
 
-            v = (View) v.getParent();
+            v = v.getParent() instanceof View ? (View) v.getParent() : null;
         }
         return scale;
     }