[Vehicle] when device is ivi, hide HWKeys
* [TIZEN-JIRA] TIVI-2572

Signed-off-by: wangjun <junx.j.wang@intel.com>
resolved that starting web simulator, three times pages switchings occured.

Signed-off-by: wangjun <junx.j.wang@intel.com>
Merge pull request #375 from junwang1216/ivi

Fixed bugs 2572 and switching times questions.