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/loaders/local_image_request.dart

@@ -0,0 +1,45 @@
+part of 'image_request.dart';
+
+class LocalImageRequest extends ImageRequest {
+  final String localId;
+  final int width;
+  final int height;
+  final AssetType assetType;
+
+  LocalImageRequest({required this.localId, required ui.Size size, required this.assetType})
+    : width = size.width.toInt(),
+      height = size.height.toInt();
+
+  @override
+  Future<ImageInfo?> load(ImageDecoderCallback decode, {double scale = 1.0}) async {
+    if (_isCancelled) {
+      return null;
+    }
+
+    Stopwatch? stopwatch;
+    if (!kReleaseMode) {
+      stopwatch = Stopwatch()..start();
+    }
+    final Map<String, int> info = await thumbnailApi.requestImage(
+      localId,
+      requestId: requestId,
+      width: width,
+      height: height,
+      isVideo: assetType == AssetType.video,
+    );
+    if (!kReleaseMode) {
+      stopwatch!.stop();
+      debugPrint('Local request $requestId took ${stopwatch.elapsedMilliseconds}ms for $localId of $width x $height');
+    }
+    final frame = await _fromPlatformImage(info);
+    return frame == null ? null : ImageInfo(image: frame.image, scale: scale);
+  }
+
+  @override
+  Future<void> _onCancelled() {
+    if (!kReleaseMode) {
+      debugPrint('Local image request $requestId for $localId of size $width x $height was cancelled');
+    }
+    return thumbnailApi.cancelImageRequest(requestId);
+  }
+}