[flutter_tools] change service worker load to NOTICES (#58890)

update flutter_service_worker.js to NOTICES

packages/flutter_tools/lib/src/build_system/targets/web.dart

@@ -378,7 +378,7 @@ class WebServiceWorker extends Target {
       '/',
       'main.dart.js',
       'index.html',
-      'assets/LICENSE',
+      'assets/NOTICES',
       if (urlToHash.containsKey('assets/AssetManifest.json'))
         'assets/AssetManifest.json',
       if (urlToHash.containsKey('assets/FontManifest.json'))
@@ -543,10 +543,10 @@ async function downloadOffline() {
   }
   for (var resourceKey in Object.keys(RESOURCES)) {
     if (!currentContent[resourceKey]) {
-      resources.add(resourceKey);
+      resources.push(resourceKey);
     }
   }
-  return Cache.addAll(resources);
+  return contentCache.addAll(resources);
 }
 ''';
 }

packages/flutter_tools/test/general.shard/build_system/targets/web_test.dart

@@ -488,7 +488,11 @@ void main() {
       contains('"a/a.txt": "7fc56270e7a70fa81a5935b72eacbe29"'));
     expect(environment.buildDir.childFile('service_worker.d'), exists);
     // Depends on resource file.
-    expect(environment.buildDir.childFile('service_worker.d').readAsStringSync(), contains('a/a.txt'));
+    expect(environment.buildDir.childFile('service_worker.d').readAsStringSync(),
+      contains('a/a.txt'));
+    // Contains NOTICES
+    expect(environment.outputDir.childFile('flutter_service_worker.js').readAsStringSync(),
+      contains('NOTICES'));
   }));
 
   test('WebServiceWorker contains baseUrl cache', () => testbed.run(() async {