Have the Resolver/Chooser activities handle resize config changes

Both of these activities do additional work and look janky when
rebuilding for a config change, especially in the presence of
multiwindow. As neither of them use layouts or other resources that
vary based on configuration, mark them as handling the relevant config
changes.

Bug 27171954

Change-Id: I38df1d875bcb063d72316b586c4d3f8074c4fad9