clean up usages of resetXyz for TestFlutterView (#180840)

While reviewing https://github.com/flutter/flutter/pull/180728 we
noticed that usage of `TestFlutterView.resetXyz()` was quite liberal and
some places benefit from using `TestFlutterView.reset()`, to avoid
repetition.

This PR cleans that up.

## Pre-launch Checklist

- [x] I read the [Contributor Guide] and followed the process outlined
there for submitting PRs.
- [x] I read the [Tree Hygiene] wiki page, which explains my
responsibilities.
- [x] I read and followed the [Flutter Style Guide], including [Features
we expect every widget to implement].
- [x] I signed the [CLA].
- [ ] I listed at least one issue that this PR fixes in the description
above.
- [x] I updated/added relevant documentation (doc comments with `///`).
- [x] I added new tests to check the change I am making, or this PR is
[test-exempt].
- [x] I followed the [breaking change policy] and added [Data Driven
Fixes] where supported.
- [ ] All existing and new tests are passing.

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<!-- Links -->
[Contributor Guide]:
https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md#overview
[Tree Hygiene]:
https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md
[test-exempt]:
https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md#tests
[Flutter Style Guide]:
https://github.com/flutter/flutter/blob/main/docs/contributing/Style-guide-for-Flutter-repo.md
[Features we expect every widget to implement]:
https://github.com/flutter/flutter/blob/main/docs/contributing/Style-guide-for-Flutter-repo.md#features-we-expect-every-widget-to-implement
[CLA]: https://cla.developers.google.com/
[flutter/tests]: https://github.com/flutter/tests
[breaking change policy]:
https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md#handling-breaking-changes
[Discord]:
https://github.com/flutter/flutter/blob/main/docs/contributing/Chat.md
[Data Driven Fixes]:
https://github.com/flutter/flutter/blob/main/docs/contributing/Data-driven-Fixes.md

examples/api/test/material/dropdown_menu/dropdown_menu.0_test.dart

@@ -105,7 +105,7 @@ void main() {
     // Resize the screen to small screen and make sure no overflowed error appears.
     tester.view.physicalSize = const Size(200, 160);
     tester.view.devicePixelRatio = 1.0;
-    addTearDown(tester.view.resetPhysicalSize);
+    addTearDown(tester.view.reset);
     await tester.pump();
 
     expect(tester.takeException(), isNull);

packages/flutter/test/cupertino/nav_bar_test.dart

@@ -3236,6 +3236,8 @@ void main() {
 
       tester.view.devicePixelRatio = 1;
       tester.binding.platformDispatcher.textScaleFactorTestValue = 1;
+      addTearDown(tester.view.reset);
+      addTearDown(tester.binding.platformDispatcher.clearTextScaleFactorTestValue);
       setWindowToPortrait(tester, size: const Size(402, 874));
 
       var count = 0;

packages/flutter/test/material/bottom_navigation_bar_test.dart

@@ -3004,9 +3004,10 @@ void main() {
   testWidgets('BottomNavigationBar linear landscape layout label RenderFlex overflow', (
     WidgetTester tester,
   ) async {
-    //Regression test for https://github.com/flutter/flutter/issues/112163
+    // Regression test for https://github.com/flutter/flutter/issues/112163
 
     tester.view.physicalSize = const Size(540, 340);
+    addTearDown(tester.view.resetPhysicalSize);
 
     await tester.pumpWidget(
       MaterialApp(
@@ -3053,8 +3054,6 @@ void main() {
       find.byType(MaterialApp),
       matchesGoldenFile('bottom_navigation_bar.label_overflow.png'),
     );
-
-    addTearDown(tester.view.resetPhysicalSize);
   });
 
   testWidgets('BottomNavigationBar keys passed through', (WidgetTester tester) async {

packages/flutter/test/material/navigation_drawer_test.dart

@@ -592,4 +592,5 @@ void widgetSetup(WidgetTester tester, double viewWidth, {double viewHeight = 100
   tester.view.devicePixelRatio = 2;
   final double dpi = tester.view.devicePixelRatio;
   tester.view.physicalSize = Size(viewWidth * dpi, viewHeight * dpi);
+  addTearDown(tester.view.reset);
 }

packages/flutter/test/material/navigation_rail_test.dart

@@ -4037,6 +4037,7 @@ void main() {
       const trailingKey = Key('trailing');
       tester.view.physicalSize = const Size(800, 600);
       tester.view.devicePixelRatio = 1.0;
+      addTearDown(tester.view.reset);
       await tester.pumpWidget(
         MaterialApp(
           home: Builder(
@@ -4091,6 +4092,7 @@ void main() {
     const trailingKey = Key('trailing');
     tester.view.physicalSize = const Size(800, 600);
     tester.view.devicePixelRatio = 1.0;
+    addTearDown(tester.view.reset);
     await tester.pumpWidget(
       MaterialApp(
         home: Builder(

packages/flutter/test/material/snack_bar_test.dart

@@ -3987,8 +3987,7 @@ void main() {
   testWidgets('Tap on button behind snack bar defined by width', (WidgetTester tester) async {
     tester.view.physicalSize = const Size.square(200);
     tester.view.devicePixelRatio = 1;
-    addTearDown(tester.view.resetPhysicalSize);
-    addTearDown(tester.view.resetDevicePixelRatio);
+    addTearDown(tester.view.reset);
 
     const buttonText = 'Show snackbar';
     const snackbarContent = 'Snackbar';
@@ -4045,8 +4044,7 @@ void main() {
     // Regression test for https://github.com/flutter/flutter/issues/78537.
     tester.view.physicalSize = const Size.square(200);
     tester.view.devicePixelRatio = 1;
-    addTearDown(tester.view.resetPhysicalSize);
-    addTearDown(tester.view.resetDevicePixelRatio);
+    addTearDown(tester.view.reset);
 
     const buttonText = 'Show snackbar';
     const snackbarContent = 'Snackbar';
@@ -4105,8 +4103,7 @@ void main() {
     // Regression test for https://github.com/flutter/flutter/issues/78537.
     tester.view.physicalSize = const Size.square(200);
     tester.view.devicePixelRatio = 1;
-    addTearDown(tester.view.resetPhysicalSize);
-    addTearDown(tester.view.resetDevicePixelRatio);
+    addTearDown(tester.view.reset);
 
     const buttonText = 'Show snackbar';
     const snackbarContent = 'Snackbar';
@@ -4203,8 +4200,7 @@ void main() {
       // Regression test for https://github.com/flutter/flutter/issues/148566.
       tester.view.physicalSize = const Size.square(200);
       tester.view.devicePixelRatio = 1;
-      addTearDown(tester.view.resetPhysicalSize);
-      addTearDown(tester.view.resetDevicePixelRatio);
+      addTearDown(tester.view.reset);
 
       const buttonText = 'Show snackbar';
       const snackbarContent = 'Snackbar';

packages/flutter/test/widgets/media_query_test.dart

@@ -1559,7 +1559,7 @@ void main() {
       physicalDoubleTapSlop: 100,
       physicalTouchSlop: 100,
     );
-    addTearDown(() => tester.view.resetGestureSettings());
+    addTearDown(tester.view.resetGestureSettings);
 
     expect(
       MediaQueryData.fromView(tester.view).gestureSettings.touchSlop,

packages/flutter/test/widgets/two_dimensional_viewport_test.dart

@@ -2110,12 +2110,11 @@ void main() {
       expect(viewport.viewportDimension, const Size(800.0, 600.0));
       tester.view.physicalSize = const Size(300.0, 300.0);
       tester.view.devicePixelRatio = 1;
+      addTearDown(tester.view.reset);
       await tester.pumpWidget(simpleBuilderTest(delegate: delegate));
       await tester.pumpAndSettle();
       viewport = getViewport(tester, childKey);
       expect(viewport.viewportDimension, const Size(300.0, 300.0));
-      tester.view.resetPhysicalSize();
-      tester.view.resetDevicePixelRatio();
     }, variant: TargetPlatformVariant.all());
 
     testWidgets('Rebuilds when delegate changes', (WidgetTester tester) async {