Fix issue #10848916: "Always" button is not working.

The problem was that the ResolverActivity filters some activities
out of the list it shows, but it uses that display list as the
list of components the preference is set against when ultimately
setting it on the package manager...  but that filtered list is *not*
the right component set, since it is not the same as the package
manager's view on it.

The fix here is to retain the original set of matching components
and use that when setting the preferred activity.  Note that this
does mean that in very unusual cases where filtering is happeing
(such as one of the activities not being exported but being seen
as a possible completion from another app), then you will be setting
the preference for the complete set.  Ultimately we probably need
to have the package manager apply these filtering rules up-front so
this is all consistent, but this is a very rare case so not that
important.

And then most of the change here is just improving the debug
output for intent resolution.

Change-Id: Ie35ac2c05a45946439951bbf41433c8b7de79c05