Efl.Ui.Radio_Legacy: Prevent unnecessary signal emit for contents

Summary:
When call elm_radio_add, theme_apply of layout is called and
_efl_ui_radio_legacy_efl_ui_widget_theme_apply is called.
Then it calls the signal emit for the icon.
this call is unnecessary.

Test Plan:
Evas_Object *bt;
clock_t start, finish;
double sum= 0 ;
double avg = 0;
double cnt = 1000;

for(int i =0 ; i<(int)cnt; i++)
  {
     start = clock();
     bt = elm_radio_add(win);
     finish = clock();
     sum += (double)(finish-start)/CLOCKS_PER_SEC;
  }
avg = sum / cnt ;
printf("radio avg : %f\n",avg);

[before]
radio avg : 0.000232

[after]
radio avg : 0.000197

Reviewers: akanad, Jaehyun_Cho, Hermet, YOhoho, zmike

Reviewed By: zmike

Subscribers: bu5hm4n, zmike, cedric, #reviewers, #committers

Tags: #efl

Differential Revision: https://phab.enlightenment.org/D11813

src/lib/elementary/efl_ui_radio.c

@@ -365,7 +365,7 @@ _efl_ui_radio_legacy_efl_ui_widget_theme_apply(Eo *obj, void *_pd EINA_UNUSED)
    /* FIXME: replicated from elm_layout just because radio's icon
     * spot is elm.swallow.content, not elm.swallow.icon. Fix that
     * whenever we can changed the theme API */
-   _icon_signal_emit(obj);
+   if (efl_finalized_get(obj)) _icon_signal_emit(obj);
 
    return int_ret;
 }