Remove notification service and update project

- Remove flutter_local_notifications dependency from pubspec.yaml
- Delete notification_service.dart file
- Remove notification service references from app_service.dart and app_binding.dart
- Clean up related code and dependencies

ohos/entry/src/main/resources/base/element/string.json

@@ -10,7 +10,7 @@
     },
     {
       "name": "EntryAbility_label",
-      "value": "mom_kitchen"
+      "value": "ohos"
     }
   ]
 }

ohos/entry/src/main/resources/en_US/element/string.json

@@ -10,7 +10,7 @@
     },
     {
       "name": "EntryAbility_label",
-      "value": "mom_kitchen"
+      "value": "ohos"
     }
   ]
 }

ohos/entry/src/main/resources/zh_CN/element/string.json

@@ -10,7 +10,7 @@
     },
     {
       "name": "EntryAbility_label",
-      "value": "mom_kitchen"
+      "value": "ohos"
     }
   ]
 }