Fix truncated text in pattern lock setup

Partially apply ag/708412 to the setup version of the layout. The
rest is not necessary because we assign a weight to the lock pattern
view as well.

Use the short header layout for screens smaller than sw360dp so that
there is more space for the pattern view.

Bug: 28663249
Change-Id: I8cda13834504a345046bc3bf6e0959d613597916