protocol: ivi hmi controller protocol to set up IVI style UI

protocol: ivi hmi controller protocol to set up IVI style UI

- introduces ivi-hmi-controller.xml

This protocol realizes following features,
- UI ready
- changing modes; tiling, side by side, full_screen, and random
- Give control a surface; workspace to be controlled by using ivi layout
  APIs
- Display/undisplay a surface; home contains sevaral workspaces to
  launch applications

Signed-off-by: Nobuhiko Tanibata <NOBUHIKO_TANIBATA@xddp.denso.co.jp>
Acked-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>