QtComp: Implement set_maximized and set_fullscreen to have something

We only support single screen for now in the api, so pretty basic still

Change-Id: I629df2378e7d3b16024090dcf620a239be4b4496
Remove unwanted api

Change-Id: I2e2d57df508b08594ec937e19259d156e5b3b547
Fix warning unused

Change-Id: Iaab48cb9a9b6675579f00dd2a5eb038c5e94904a
Send expose event when application changes size

When the geometry of a wayland window is changed from the application
itself (with QWindow::setGeometry) there should be an expose event sent,
so that for example the scene graph renderer updates the size of the
rendered view.

Change-Id: If78710a9ff2693596c105ab32d3bdc2e39dbdb02
Update error text to match required Wayland version

The required Wayland version was updated to 1.1, but the top-level error
message was not updated to reflect this.

Change-Id: Ifc1c7552a4a38986685c214e24241704fd774e11
Remove unused Surface::id() method

Change-Id: I6a70511bc731ea43f7e92b0196f0e5938148a814