Improve ResolverActivity UX on TV

The following problems were fixed:

1. It's not possible to select "Just once" / "Always" buttons when the list doesn't fit all the items;

2. The list doesn't automatically scroll when selecting an item that's out of the view;

3. When there's a default action assigned, the dialog has an interactive "Use a different app" header, that's selected by default and does nothing.

Bug: 119841729
Test: atest ChooserActivityTest ResolverActivityTest
Change-Id: Ib143636ea009f9f155942af68c3a3a6250ec8261