feat(mobile): platform image providers (#20927)

* platform image providers

* use key

* fix cache manager

* more logs, cancel on dispose instead

* split into separate files

* fix saving to cache

* cancel multi-stage provider

* refactored `getInitialImage`

* only wait for disposal for full images

* cached image works

* formatting

* lower asset viewer ram usage

---------

Co-authored-by: Alex <alex.tran1502@gmail.com>

mobile/lib/infrastructure/repositories/asset_media.repository.dart

@@ -1,18 +0,0 @@
-import 'dart:typed_data';
-import 'dart:ui';
-
-import 'package:photo_manager/photo_manager.dart';
-
-class AssetMediaRepository {
-  const AssetMediaRepository();
-
-  Future<Uint8List?> getThumbnail(String id, {int quality = 80, Size size = const Size.square(256)}) => AssetEntity(
-    id: id,
-    // The below fields are not used in thumbnailDataWithSize but are required
-    // to create an AssetEntity instance. It is faster to create a dummy AssetEntity
-    // instance than to fetch the asset from the device first.
-    typeInt: AssetType.image.index,
-    width: size.width.toInt(),
-    height: size.height.toInt(),
-  ).thumbnailDataWithSize(ThumbnailSize(size.width.toInt(), size.height.toInt()), quality: quality);
-}