[flutter_tools] convert devtools URL to a better format (#85170)

diff --git a/packages/flutter_tools/lib/src/resident_devtools_handler.dart b/packages/flutter_tools/lib/src/resident_devtools_handler.dart
index 8d03880..628c1a9 100644
--- a/packages/flutter_tools/lib/src/resident_devtools_handler.dart
+++ b/packages/flutter_tools/lib/src/resident_devtools_handler.dart

@@ -288,3 +288,13 @@
     return;
   }
 }
+
+/// Convert a [URI] with query parameters into a display format instead
+/// of the default URI encoding.
+String urlToDisplayString(Uri uri) {
+  final StringBuffer base = StringBuffer(uri.replace(
+    queryParameters: <String, String>{},
+  ).toString());
+  base.write(uri.queryParameters.keys.map((String key) => '$key=${uri.queryParameters[key]}').join('&'));
+  return base.toString();
+}

diff --git a/packages/flutter_tools/lib/src/resident_runner.dart b/packages/flutter_tools/lib/src/resident_runner.dart
index f7d2f0b..b97373e 100644
--- a/packages/flutter_tools/lib/src/resident_runner.dart
+++ b/packages/flutter_tools/lib/src/resident_runner.dart

@@ -1409,7 +1409,7 @@
         if (uri != null) {
           globals.printStatus(
             'The Flutter DevTools debugger and profiler '
-            'on ${device.device.name} is available at: $uri',
+            'on ${device.device.name} is available at: ${urlToDisplayString(uri)}',
           );
         }
       }

diff --git a/packages/flutter_tools/test/general.shard/resident_devtools_handler_test.dart b/packages/flutter_tools/test/general.shard/resident_devtools_handler_test.dart
index 34c9f36..8c293e7 100644
--- a/packages/flutter_tools/test/general.shard/resident_devtools_handler_test.dart
+++ b/packages/flutter_tools/test/general.shard/resident_devtools_handler_test.dart

@@ -427,6 +427,13 @@
     expect(handler.launchDevToolsInBrowser(flutterDevices: <FlutterDevice>[]), isTrue);
     expect(handler.launchedInBrowser, isTrue);
   });
+
+  testWithoutContext('Converts a VmService URI with a query parameter to a pretty display string', () {
+    const String value = 'http://127.0.0.1:9100?uri=http%3A%2F%2F127.0.0.1%3A57922%2F_MXpzytpH20%3D%2F';
+    final Uri uri = Uri.parse(value);
+
+    expect(urlToDisplayString(uri), 'http://127.0.0.1:9100?uri=http://127.0.0.1:57922/_MXpzytpH20=/');
+  });
 }
 
 class FakeDevtoolsLauncher extends Fake implements DevtoolsLauncher {