Deprecate ListActivity and ExpandableListActivity

These classes provide minimal functionality over the view classes,
and are incompatible with appcompat or other activity base classes.
Plus, RecyclerView implements all this functionality in a more
modern way now anyway.

Bug: 144042891
Change-Id: Ibd1faba0f2e05028da867aa4bb3ce5d2ae14e004
Test: No behavior changes