semantic: Add namedRoutes for bottomnavbar on home

Author: MritunjayTiwari14

lib/widgets/home.dart

@@ -132,10 +132,11 @@ class _HomePageState extends State<HomePage> {
       body: Stack(
         children: [
           for (final (tab, body) in pageBodies)
-            // TODO(#535): Decide if we find it helpful to use something like
-            //   [SemanticsProperties.namesRoute] to structure this UI better
-            //   for screen-reader software.
-            Offstage(offstage: tab != _tab.value, child: body),
+            Offstage(
+              offstage: tab != _tab.value,
+              child: Semantics(
+                namesRoute: true,
+                child: body))
         ]),
       bottomNavigationBar: DecoratedBox(
         decoration: BoxDecoration(