Updates flutter_localizations/test to stop using TestWindow (flutter#122321)

Updates `flutter_localizations/test` to stop using `TestWindow`

Author: pdblasi-google

packages/flutter_localizations/test/material/date_picker_test.dart

@@ -227,10 +227,9 @@ void main() {
     const Size kCommonScreenSizeLandscape = Size(1770, 1070);
 
     Future<void> showPicker(WidgetTester tester, Locale locale, Size size) async {
-      tester.binding.window.physicalSizeTestValue = size;
-      addTearDown(tester.binding.window.clearPhysicalSizeTestValue);
-      tester.binding.window.devicePixelRatioTestValue = 1.0;
-      addTearDown(tester.binding.window.clearDevicePixelRatioTestValue);
+      tester.view.physicalSize = size;
+      tester.view.devicePixelRatio = 1.0;
+      addTearDown(tester.view.reset);
       await tester.pumpWidget(
         MaterialApp(
           home: Builder(

packages/flutter_localizations/test/material/time_picker_test.dart

@@ -9,8 +9,9 @@ import 'package:flutter_test/flutter_test.dart';
 void main() {
   testWidgets('can localize the header in all known formats - portrait', (WidgetTester tester) async {
     // Ensure picker is displayed in portrait mode.
-    tester.binding.window.physicalSizeTestValue = const Size(400, 800);
-    tester.binding.window.devicePixelRatioTestValue = 1;
+    tester.view.physicalSize = const Size(400, 800);
+    tester.view.devicePixelRatio = 1;
+    addTearDown(tester.view.reset);
 
     final Finder stringFragmentTextFinder = find.descendant(
       of: find.byWidgetPredicate((Widget w) => '${w.runtimeType}' == '_StringFragment'),
@@ -74,15 +75,13 @@ void main() {
       await tester.tapAt(Offset(center.dx, center.dy - 50.0));
       await finishPicker(tester);
     }
-
-    tester.binding.window.clearPhysicalSizeTestValue();
-    tester.binding.window.clearDevicePixelRatioTestValue();
   });
 
   testWidgets('can localize the header in all known formats - landscape', (WidgetTester tester) async {
     // Ensure picker is displayed in landscape mode.
-    tester.binding.window.physicalSizeTestValue = const Size(800, 400);
-    tester.binding.window.devicePixelRatioTestValue = 1;
+    tester.view.physicalSize = const Size(800, 400);
+    tester.view.devicePixelRatio = 1;
+    addTearDown(tester.view.reset);
 
     final Finder stringFragmentTextFinder = find.descendant(
       of: find.byWidgetPredicate((Widget w) => '${w.runtimeType}' == '_StringFragment'),
@@ -151,9 +150,6 @@ void main() {
       await tester.tapAt(Offset(center.dx, center.dy - 50.0));
       await finishPicker(tester);
     }
-
-    tester.binding.window.clearPhysicalSizeTestValue();
-    tester.binding.window.clearDevicePixelRatioTestValue();
   });
 
   testWidgets('can localize input mode in all known formats', (WidgetTester tester) async {