[M120 Migration][VD] Don't set focus when FinishLoad

[M120 Migration][VD] Don't set focus when FinishLoad

For WRT type App, will set focus when app show:
WRTNativeWindow::Show()->WRTNativeWindow::Focus();
For Browser/hbbtv type App, will set focus by ewk_view_focus_set api.

Keep same with M94, don't set focus when FinishLoad, or else will cause
two focus issue: one focus on webview, another focus on app(such as on
webbrowser url).

refer:
https://review.tizen.org/gerrit/#/c/296637/

Change-Id: I61eee8952019b9cc342ad88503276bb6399a6d43
Signed-off-by: fangfengrong <fr.fang@samsung.com>