Fix PopupWindow of overflow menu is not RTL(Right to Left) issue

Sometimes, PopupWindow doesn't update layout direction in time when the
layout direction of its anchor view changes.

Update the layout direction of PopupWindow when the layout direction of
its anchor view changes.

CRs-Fixed: 759907

Change-Id: I1141e83b7f4b0cda4e52082608d002500efe4088