Refine starboard shared wayland

let wayland can compile on tizen and other
wayland platform such as ubuntu 17.10.

create ApplicationTizen inherit from ApplicationWayland,
put all of the Tizen-specific code inside in it.

create DevInput to handle all dev inputs handlers.

create SbWindowPrivateTizen inherit from SbWindowPrivate,
put all of the Tizen-specific code inside in it.

Change-Id: I5247010a001258869ace8ae4588d8a9bb2152e5f