Fix WidgetApp.title documentation (#22011)

Closes #16031

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

@@ -235,9 +235,9 @@ class WidgetsApp extends StatefulWidget {
   /// A one-line description used by the device to identify the app for the user.
   ///
   /// On Android the titles appear above the task manager's app snapshots which are
-  /// displayed when the user presses the "recent apps" button. Similarly, on
-  /// iOS the titles appear in the App Switcher when the user double presses the
-  /// home button.
+  /// displayed when the user presses the "recent apps" button. On iOS this
+  /// value cannot be used. `CFBundleDisplayName` from the app's `Info.plist` is
+  /// referred to instead whenever present, `CFBundleName` otherwise.
   ///
   /// To provide a localized title instead, use [onGenerateTitle].
   /// {@endtemplate}

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

@@ -10,7 +10,7 @@ import 'framework.dart';
 
 /// A widget that describes this app in the operating system.
 class Title extends StatelessWidget {
-  /// Creates a widget that describes this app to the operating system.
+  /// Creates a widget that describes this app to the Android operating system.
   ///
   /// [title] will default to the empty string if not supplied.
   /// [color] must be an opaque color (i.e. color.alpha must be 255 (0xFF)).