test: Share default new_feature_info_str from APP_GET_INIT_STATUS and parse unconditionally

Author: allenporter

tests/devices/traits/v1/fixtures.py

@@ -125,11 +125,8 @@ async def discover_features_fixture(
     """Fixture to handle device feature discovery."""
     assert device.v1_properties
 
-    new_feature_info_str = device_info.new_feature_set or "0000000000002000"
-    try:
-        new_feature_info = int(new_feature_info_str, 16)
-    except ValueError:
-        new_feature_info = 0
+    new_feature_info_str = device_info.new_feature_set or str(mock_data.APP_GET_INIT_STATUS["new_feature_info_str"])
+    new_feature_info = int(new_feature_info_str, 16)
 
     mock_rpc_channel.send_command.side_effect = [
         [