Web app is not launching in user binary

Web app is not launching in user binary

[Model] Pride Z250F
[BinType] AP
[Customer] N/A

[Issue#] P170109-05747
[Request] N/A
[Occurrence Version]

[Problem]  Window show & active are not being called
[Cause & Measure] Cause:  lang_changed_mode_ is not initialized
in WebApplication object which is created using overloaded WebApplication
constructor using Ewk_context.
During frame rendered callback, window show & active will not be called
upon language call back.
Measure: Initialize lang_changed_mode_ to false in WebApplication object
[Checking Method]
 Web application window should be shown on launching the app

[Team] Web Run Time
[Developer] Srinivasarao J
[Solution company] Samsung
[Change Type] N/A

Change-Id: I0eb5acb7cafcee695bf8c6735baa6b41c1f6a91d