[Tizen] Replace the exception case in tizen backend.

[Tizen] Replace the exception case in tizen backend.

Replace the excepption case in tizen backend when display server does not work.
When display server does not work, then ecore_wl2_display_connect() does not work and crash occurs in application size.
To handle the failure case where the display server does not work in the Tizen backend, you can modify the ecore_wl2_display_connect() function to avoid crashing the application.
Specifically, replace the exit() call with a more graceful error handling mechanism.

Change-Id: I25cb6cdaf8a4a9a64bb36ecdeef08a1505082c2e