Created landscape layout for group empty view

Created a landscape layout for the empty view in groups, and
adjusted the dimens and integers so view displays correctly
in multiwindow mode.

Test: Manually tested new layouts in landscape, portrait,
multiview sizes and on tablets.

Bug: 33841666

Change-Id: I9fce9893ce6b0b854b9fc7dda8895e969e3b76e2