feat(lib, android, ios): permissions clean up, add id to files pack

lib/src/model/nearby_files_pack.dart

@@ -7,12 +7,14 @@ import 'package:nearby_service/nearby_service.dart';
 ///
 class ReceivedNearbyFilesPack implements NearbyReceivedInterface {
   const ReceivedNearbyFilesPack({
+    required this.id,
     required this.sender,
     required this.files,
   });
 
   factory ReceivedNearbyFilesPack.fromJson(Map<String, dynamic>? json) {
     return ReceivedNearbyFilesPack(
+      id: json?['id'],
       sender: NearbyDeviceInfo.fromJson(json?['sender']),
       files: [
         ...?(json?['files'] as List?)?.map(
@@ -30,8 +32,14 @@ class ReceivedNearbyFilesPack implements NearbyReceivedInterface {
   ///
   final List<NearbyFileInfo> files;
 
+  ///
+  /// ID of the files pack
+  ///
+  final String id;
+
   Map<String, dynamic> toJson() {
     return {
+      'id': id,
       'sender': sender.toJson(),
       'files': [
         ...files.map((e) => e.toJson()),
@@ -45,13 +53,14 @@ class ReceivedNearbyFilesPack implements NearbyReceivedInterface {
       other is ReceivedNearbyFilesPack &&
           runtimeType == other.runtimeType &&
           sender == other.sender &&
-          files == other.files;
+          files == other.files &&
+          id == other.id;
 
   @override
-  int get hashCode => sender.hashCode ^ files.hashCode;
+  int get hashCode => sender.hashCode ^ files.hashCode ^ id.hashCode;
 
   @override
   String toString() {
-    return 'NearbyFilesPack{sender: $sender, files: $files}';
+    return 'ReceivedNearbyFilesPack{sender: $sender, files: $files, id: $id}';
   }
 }

lib/src/model/nearby_message_content.dart

@@ -177,6 +177,6 @@ final class NearbyMessageFilesResponse extends NearbyMessageContent {
 
   @override
   String toString() {
-    return 'NearbyMessageFileResponse{response: $isAccepted, id: $id}';
+    return 'NearbyMessageFileResponse{isAccepted: $isAccepted, id: $id}';
   }
 }