Fixes NPE in ListViews with non-selectable items. This was caused by a weird...

Fixes NPE in ListViews with non-selectable items. This was caused by a weird initialization issue in ListView and AbsListView: a private final field instanciated in the declaration in ListView was used in AbsListView<init> via an overriden method and that field was somehow null at this time. This fix moves the instanciation at a later point.