Ensure AbsListView's drawable state reflects its actual state

Previously, AbsListView assumed its drawable state would only be used
for the selector, so it only reflected the state of the selected child.
This didn't work so well for views that inherited from AbsListView or
for managing the scroll bar drawable state.

Change-Id: I73889645488b9a0fecbf4186b2d83d2511eccf35