[DO NOT MERGE] Resolver/Chooser - Window inset fixes

Resolver supports numerous layouts, with optional ViewGroups. Need to
make sure the window inset is applied to the correct view. If there is
a List present, add a footer so that the list scrolls underneath the
navbar.

Test: atest ResolverActivityTest
Bug: 145670872
Change-Id: I94652c5e0068436878a307701b5785f02060b8d6