chore: bump dart sdk to 3.8 (#20355)

* chore: bump dart sdk to 3.8

* chore: make build

* make pigeon

* chore: format files

---------

Co-authored-by: shenlong-tanwen <139912620+shalong-tanwen@users.noreply.github.com>

mobile/test/fixtures/album.stub.dart

@@ -42,20 +42,21 @@ final class AlbumStub {
     endDate: DateTime(2023),
   )..assets.addAll([AssetStub.image1]);
 
-  static final twoAsset = Album(
-    name: "album-with-two-assets",
-    localId: "album-with-two-assets-local",
-    remoteId: "album-with-two-assets-remote",
-    createdAt: DateTime(2001),
-    modifiedAt: DateTime(2010),
-    shared: false,
-    activityEnabled: false,
-    startDate: DateTime(2019),
-    endDate: DateTime(2020),
-  )
-    ..assets.addAll([AssetStub.image1, AssetStub.image2])
-    ..activityEnabled = true
-    ..owner.value = User.fromDto(UserStub.admin);
+  static final twoAsset =
+      Album(
+          name: "album-with-two-assets",
+          localId: "album-with-two-assets-local",
+          remoteId: "album-with-two-assets-remote",
+          createdAt: DateTime(2001),
+          modifiedAt: DateTime(2010),
+          shared: false,
+          activityEnabled: false,
+          startDate: DateTime(2019),
+          endDate: DateTime(2020),
+        )
+        ..assets.addAll([AssetStub.image1, AssetStub.image2])
+        ..activityEnabled = true
+        ..owner.value = User.fromDto(UserStub.admin);
 
   static final create2020end2020Album = Album(
     name: "create2020update2020Album",