Use wide conversation on portrait 10" tablet

On tablets we show a single pane for search results in portrait mode

On 10" tablets we want to show the wide conversation headers

This cl is using the swXXXdp qualifer because the show_two_pane_search_results
is also using the same qualifier.  5198708 tracks switching from swXXXdp to
wXXXdp qualifers

Change-Id: Ie0a693dead7c4d4f08bd453e9dce30618e6ccd29
4 files changed