Revert "Update FocusManager platform check to include iOS" (#148978)

Author: Renzo-Olivares

packages/flutter/lib/src/widgets/focus_manager.dart

@@ -1532,21 +1532,12 @@ class FocusManager with DiagnosticableTreeMixin, ChangeNotifier {
     if (kFlutterMemoryAllocationsEnabled) {
       ChangeNotifier.maybeDispatchObjectCreation(this);
     }
-    final bool shouldListenToAppLifecycle = switch (defaultTargetPlatform) {
-      TargetPlatform.android || TargetPlatform.iOS => false,
-      TargetPlatform.fuchsia || TargetPlatform.linux => true,
-      TargetPlatform.windows || TargetPlatform.macOS => true,
-    };
-    if (shouldListenToAppLifecycle) {
+    if (kIsWeb || defaultTargetPlatform != TargetPlatform.android) {
       // It appears that some Android keyboard implementations can cause
       // app lifecycle state changes: adding this listener would cause the
       // text field to unfocus as the user is trying to type.
       //
-      // Additionally, on iOS, input fields aren't automatically populated
-      // with relevant data when using autofill.
-      //
-      // Until these are resolved, we won't be adding the listener to mobile platforms.
-      // https://github.com/flutter/flutter/issues/148475#issuecomment-2118407411
+      // Until this is resolved, we won't be adding the listener to Android apps.
       // https://github.com/flutter/flutter/pull/142930#issuecomment-1981750069
       _appLifecycleListener = _AppLifecycleListener(_appLifecycleChange);
       WidgetsBinding.instance.addObserver(_appLifecycleListener!);

packages/flutter/test/widgets/focus_manager_test.dart

@@ -354,13 +354,9 @@ void main() {
       logs.clear();
     }, variant: KeySimulatorTransitModeVariant.all());
 
-    testWidgets('FocusManager ignores app lifecycle changes on Android and iOS.', (WidgetTester tester) async {
-      final bool shouldListenToAppLifecycle = switch (defaultTargetPlatform) {
-        TargetPlatform.android || TargetPlatform.iOS => false,
-        TargetPlatform.fuchsia || TargetPlatform.linux => true,
-        TargetPlatform.windows || TargetPlatform.macOS => true,
-      };
-      if (shouldListenToAppLifecycle) {
+    testWidgets('FocusManager ignores app lifecycle changes on Android.', (WidgetTester tester) async {
+      final bool shouldRespond = kIsWeb || defaultTargetPlatform != TargetPlatform.android;
+      if (shouldRespond) {
         return;
       }
 
@@ -391,12 +387,8 @@ void main() {
     });
 
     testWidgets('FocusManager responds to app lifecycle changes.', (WidgetTester tester) async {
-      final bool shouldListenToAppLifecycle = switch (defaultTargetPlatform) {
-        TargetPlatform.android || TargetPlatform.iOS => false,
-        TargetPlatform.fuchsia || TargetPlatform.linux => true,
-        TargetPlatform.windows || TargetPlatform.macOS => true,
-      };
-      if (!shouldListenToAppLifecycle) {
+      final bool shouldRespond = kIsWeb || defaultTargetPlatform != TargetPlatform.android;
+      if (!shouldRespond) {
         return;
       }