add an --enable-vmservice flag (#50663)

diff --git a/packages/flutter_tools/bin/fuchsia_tester.dart b/packages/flutter_tools/bin/fuchsia_tester.dart
index 0e60a96..0fc00e5 100644
--- a/packages/flutter_tools/bin/fuchsia_tester.dart
+++ b/packages/flutter_tools/bin/fuchsia_tester.dart
@@ -142,7 +142,8 @@
       tests[source] = dill;
     }
 
-    exitCode = await runTests(
+    // TODO(dnfield): This should be injected.
+    exitCode = await const FlutterTestRunner().runTests(
       const TestWrapper(),
       tests.keys.toList(),
       workDir: testDirectory,