TraitAbsListView extends TraitAdapterView directly (enhance #16)

I found that `TraitAdapterView` is not mixed in `TraitListView` after the migration to SBT.

Originally I mixed it like before, but after some research found that `android.widget.AbsListView` extends `android.widget.AdapterView` directly so I made `TraitAdapterView` as the direct parent of `TraitAbsListView`, which is extended by not only `TraitListView` but also `TraitGridView`.

As a result, more classes got missing members back.