Provide Appbar's `foregroundColor` to package license page titles (#95685)

packages/flutter/lib/src/material/about.dart

@@ -920,12 +920,14 @@ class _PackageLicensePageTitle extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
+    final Color? color = Theme.of(context).appBarTheme.foregroundColor;
+
     return Column(
       mainAxisAlignment: MainAxisAlignment.center,
       crossAxisAlignment: CrossAxisAlignment.start,
       children: <Widget>[
-        Text(title, style: theme.headline6),
-        Text(subtitle, style: theme.subtitle2),
+        Text(title, style: theme.headline6?.copyWith(color: color)),
+        Text(subtitle, style: theme.subtitle2?.copyWith(color: color)),
       ],
     );
   }

packages/flutter/test/material/about_test.dart

@@ -289,11 +289,11 @@ void main() {
 
     const TextStyle titleTextStyle = TextStyle(
       fontSize: 20,
-      color: Colors.black,
+      color: Colors.indigo,
     );
     const TextStyle subtitleTextStyle = TextStyle(
       fontSize: 15,
-      color: Colors.red,
+      color: Colors.indigo,
     );
 
     await tester.pumpWidget(
@@ -315,6 +315,7 @@ void main() {
               headline6: titleTextStyle,
               subtitle2: subtitleTextStyle,
             ),
+            foregroundColor: Colors.indigo,
           ),
         ),
         home: const Center(