Update modernie property provider to recognize IE11 on WP 8.1 Update (#14376)

Change-Id: I8df8260bf875dd2a3cf974885bde8b473f4951a5
Update VBrowserDetails to handle the new IE11 UA on WP 8.1 Update (#14376)

Change-Id: I7fdd091a3b2994270e9928eb4f118ab5ca59ef30