shell: Do not set none role for applications w/o appid

shell: Do not set none role for applications w/o appid

With commit 'layout: Send dimensions when setting up property as
fullscreen' we made so that fullscreen applications will receive the
configure event right from the beginning but that changed a bit the way
we handled applications that do not set-up an appid before doing the
initial wl_surface.commit.

Avoid doing that such that applications do not need to go through a
resize.

Signed-off-by: Marius Vlad <marius.vlad@collabora.com>
Change-Id: I91a9ab97ff5e30d3a86cda499d394c1a9fcde338