Add LVGL lv_obj_ functions (ByteWelder#425)

Author: KenVanHoeylandt

TactilityC/Source/tt_init.cpp

@@ -373,7 +373,12 @@ const esp_elfsym main_symbols[] {
     ESP_ELFSYM_EXPORT(lv_obj_get_y),
     ESP_ELFSYM_EXPORT(lv_obj_get_content_width),
     ESP_ELFSYM_EXPORT(lv_obj_get_content_height),
+    ESP_ELFSYM_EXPORT(lv_obj_get_group),
     ESP_ELFSYM_EXPORT(lv_obj_get_user_data),
+    ESP_ELFSYM_EXPORT(lv_obj_get_state),
+    ESP_ELFSYM_EXPORT(lv_obj_has_flag),
+    ESP_ELFSYM_EXPORT(lv_obj_has_flag_any),
+    ESP_ELFSYM_EXPORT(lv_obj_has_state),
     ESP_ELFSYM_EXPORT(lv_obj_invalidate),
     ESP_ELFSYM_EXPORT(lv_obj_is_valid),
     ESP_ELFSYM_EXPORT(lv_obj_remove_event_cb),