[Tizen][Runtime] Enable the application URL for using Tizen app id.

For Tizen WRT, the app url like app://tizen.appid could be used to load
resources belong to other web application. Crosswalk runtime on Tizen
should follow what Tizen WRT does. The patch will enable to support the
url like app://tizen.appid in Crosswalk runtime model, and the crosswalk
application url like app://crosswalk.appid will be enabled as well.

BUG=XWALK-1762