[Tizen][Runtime]Implement screen-orientation feature.

According to Tizen core spec feature XWALK-1491, add a setting attribute "screen-orientation" in Tizen configure file.
This attribute controls whether screen orietation is locked or not. Its value can be one of "portrait", "landscape", "auto-rotation", and the default value should be "portrait".
im not sure this is correct. If the system locks it, then that should basically not really call this API, because unlock should always unlock to the system setting.