Implement FlutterDesktopViewGetResourceId

[xiaowei-guan]

Replace surface id with resource id for fixing overlap issue on Tizen TV 6.0.

[JSUYA]

@xiaowei-guan Hi Can you please tell us the PR or codes that uses FlutterDesktopViewGetResourceId()?
If used only in plugins, wouldn't it be better to use a method channel (window channel or platform(view) channel)?

[xiaowei-guan]

@xiaowei-guan Hi Can you please tell us the PR or codes that uses FlutterDesktopViewGetResourceId()? If used only in plugins, wouldn't it be better to use a method channel (window channel or platform(view) channel)?

Hello, this new API just for video_palyer_avplay plugin(xiaowei-guan/plugins@f3cff83)

[JSUYA]

FYI :Maybe below code could get the same result.
I think, we are already using ext api in embedder, so current code is also good

static Eina_Bool window_show(void *data ,
                                        int type EINA_UNUSED,
                                        void *event ) {
  Ecore_Wl2_Event_Window_Show *ev =
      static_cast<Ecore_Wl2_Event_Window_Show *>(event);
  if (data) {
    *reinterpret_cast<uint32_t *>(data) =
        static_cast<unsigned int>(ev->data[0]);
  }

  return ECORE_CALLBACK_PASS_ON;
}
...
ecore_event_handler_add(ECORE_WL2_EVENT_WINDOW_SHOW, window_show,
                          &resource_id_);