chore: Update default value for new feature string to empty string

Author: allenporter

roborock/data/v1/v1_containers.py

@@ -585,7 +585,7 @@ class AppInitStatus(RoborockBase):
     local_info: AppInitStatusLocalInfo
     feature_info: list[int]
     new_feature_info: int
-    new_feature_info_str: str | None = None
+    new_feature_info_str: str = ""
     new_feature_info_2: int | None = None
     carriage_type: int | None = None
     dsp_version: str | None = None

roborock/devices/traits/v1/device_features.py

@@ -44,7 +44,7 @@ def _parse_response(self, response: common.V1ResponseData) -> DeviceFeatures:
         app_status = AppInitStatus.from_dict(response[0])
         return DeviceFeatures.from_feature_flags(
             new_feature_info=app_status.new_feature_info,
-            new_feature_info_str=app_status.new_feature_info_str or "",
+            new_feature_info_str=app_status.new_feature_info_str,
             feature_info=app_status.feature_info,
             product_nickname=self._nickname,
         )