[path_provider_*] code cleanup: sort directives (#3823)

* sort directives

* fmt

Author: pq

packages/path_provider/path_provider/example/integration_test/path_provider_test.dart

@@ -6,8 +6,8 @@
 
 import 'dart:io';
 import 'package:flutter_test/flutter_test.dart';
-import 'package:path_provider/path_provider.dart';
 import 'package:integration_test/integration_test.dart';
+import 'package:path_provider/path_provider.dart';
 
 void main() {
   IntegrationTestWidgetsFlutterBinding.ensureInitialized();

packages/path_provider/path_provider/integration_test/path_provider_test.dart

@@ -5,8 +5,8 @@
 // @dart=2.9
 
 import 'package:flutter_test/flutter_test.dart';
-import 'package:path_provider/path_provider.dart';
 import 'package:integration_test/integration_test.dart';
+import 'package:path_provider/path_provider.dart';
 
 void main() {
   IntegrationTestWidgetsFlutterBinding.ensureInitialized();

packages/path_provider/path_provider/lib/path_provider.dart

@@ -6,10 +6,10 @@ import 'dart:io' show Directory, Platform;
 
 import 'package:flutter/foundation.dart' show kIsWeb, visibleForTesting;
 import 'package:path_provider_linux/path_provider_linux.dart';
-import 'package:path_provider_windows/path_provider_windows.dart';
 import 'package:path_provider_platform_interface/path_provider_platform_interface.dart';
 // ignore: implementation_imports
 import 'package:path_provider_platform_interface/src/method_channel_path_provider.dart';
+import 'package:path_provider_windows/path_provider_windows.dart';
 
 export 'package:path_provider_platform_interface/path_provider_platform_interface.dart'
     show StorageDirectory;

packages/path_provider/path_provider_linux/example/integration_test/path_provider_test.dart

@@ -6,8 +6,8 @@
 
 import 'dart:io';
 import 'package:flutter_test/flutter_test.dart';
-import 'package:path_provider_linux/path_provider_linux.dart';
 import 'package:integration_test/integration_test.dart';
+import 'package:path_provider_linux/path_provider_linux.dart';
 
 void main() {
   IntegrationTestWidgetsFlutterBinding.ensureInitialized();

packages/path_provider/path_provider_macos/example/integration_test/path_provider_test.dart

@@ -6,8 +6,8 @@
 
 import 'dart:io';
 import 'package:flutter_test/flutter_test.dart';
-import 'package:path_provider_platform_interface/path_provider_platform_interface.dart';
 import 'package:integration_test/integration_test.dart';
+import 'package:path_provider_platform_interface/path_provider_platform_interface.dart';
 
 void main() {
   IntegrationTestWidgetsFlutterBinding.ensureInitialized();

packages/path_provider/path_provider_windows/example/integration_test/path_provider_test.dart

@@ -6,8 +6,8 @@
 
 import 'dart:io';
 import 'package:flutter_test/flutter_test.dart';
-import 'package:path_provider_windows/path_provider_windows.dart';
 import 'package:integration_test/integration_test.dart';
+import 'package:path_provider_windows/path_provider_windows.dart';
 
 void main() {
   IntegrationTestWidgetsFlutterBinding.ensureInitialized();