feat(mobile): enhance download operations (#12973)

* add packages

* create download task

* show progress

* save video and image

* show progress info

* live photo wip

* download and link live photos

* Update list of assets

* wip

* correct progress

* add state to download

* revert unncessary change

* repository pattern

* translation

* remove unused code

* update method call from repository

* remove unused variable

* handle multiple livephotos download

* remove logging statement

* lint

* not removing all records

mobile/lib/models/download/livephotos_medatada.model.dart

@@ -0,0 +1,60 @@
+// ignore_for_file: public_member_api_docs, sort_constructors_first
+import 'dart:convert';
+
+enum LivePhotosPart {
+  video,
+  image,
+}
+
+class LivePhotosMetadata {
+  // enum
+  LivePhotosPart part;
+
+  String id;
+  LivePhotosMetadata({
+    required this.part,
+    required this.id,
+  });
+
+  LivePhotosMetadata copyWith({
+    LivePhotosPart? part,
+    String? id,
+  }) {
+    return LivePhotosMetadata(
+      part: part ?? this.part,
+      id: id ?? this.id,
+    );
+  }
+
+  Map<String, dynamic> toMap() {
+    return <String, dynamic>{
+      'part': part.index,
+      'id': id,
+    };
+  }
+
+  factory LivePhotosMetadata.fromMap(Map<String, dynamic> map) {
+    return LivePhotosMetadata(
+      part: LivePhotosPart.values[map['part'] as int],
+      id: map['id'] as String,
+    );
+  }
+
+  String toJson() => json.encode(toMap());
+
+  factory LivePhotosMetadata.fromJson(String source) =>
+      LivePhotosMetadata.fromMap(json.decode(source) as Map<String, dynamic>);
+
+  @override
+  String toString() => 'LivePhotosMetadata(part: $part, id: $id)';
+
+  @override
+  bool operator ==(covariant LivePhotosMetadata other) {
+    if (identical(this, other)) return true;
+
+    return other.part == part && other.id == id;
+  }
+
+  @override
+  int get hashCode => part.hashCode ^ id.hashCode;
+}