Route render target binding through platform services

src/app_events.cpp

@@ -237,6 +237,16 @@ void App::present_render_context()
     active_platform_services().present_render_context();
 }
 
+void App::bind_default_render_target()
+{
+    active_platform_services().bind_default_render_target();
+}
+
+void App::bind_main_render_target()
+{
+    active_platform_services().bind_main_render_target();
+}
+
 void App::begin_render_capture_frame()
 {
     active_platform_services().begin_render_capture_frame();