[flutter_tools] detect ipv6 in fuchsia server url (#55605)

packages/flutter_tools/lib/src/fuchsia/fuchsia_pm.dart

@@ -192,7 +192,7 @@ class FuchsiaPackageServer {
   Process _process;
 
   /// The URL that can be used by the device to access this package server.
-  String get url => 'http://$_host:$_port';
+  String get url => Uri(scheme: 'http', host: _host, port: _port).toString();
 
   // The name used to reference the server by fuchsia-pkg:// urls.
   final String name;

packages/flutter_tools/test/general.shard/fuchsia/fuchsia_pm_test.dart

@@ -71,6 +71,16 @@ void main() {
       FuchsiaArtifacts: () => mockFuchsiaArtifacts,
       ProcessManager: () => mockProcessManager,
     });
+
+    testWithoutContext('ipv6 formatting logic of FuchsiaPackageServer', () {
+      const String host = 'fe80::ec4:7aff:fecc:ea8f%eno2';
+      const int port = 23;
+
+      expect(
+        FuchsiaPackageServer('a', 'b', host, port).url,
+        'http://[fe80::ec4:7aff:fecc:ea8f%25eno2]:23',
+      );
+    });
   });
 }