ivi-shell: ivi-layout, modify comments, surface/layer/screen -> ivi_*

Signed-off-by: Nobuhiko Tanibata <NOBUHIKO_TANIBATA@xddp.denso.co.jp>
ivi-shell: hmi-controller, modify comments, surface/layer/screen -> ivi_*

Signed-off-by: Nobuhiko Tanibata <NOBUHIKO_TANIBATA@xddp.denso.co.jp>