[Fuchsia] Implements NetworkInterface.list()

runtime/tests/vm/dart/hello_fuchsia_test.dart

Index: runtime/tests/vm/dart/hello_fuchsia_test.dart
diff --git a/runtime/tests/vm/dart/hello_fuchsia_test.dart b/runtime/tests/vm/dart/hello_fuchsia_test.dart
index cc5363ad856ddef6c813413224962b8bbc1b9857..8ca65633261175daffd3517fb6db4f17049b119e 100644
--- a/runtime/tests/vm/dart/hello_fuchsia_test.dart
+++ b/runtime/tests/vm/dart/hello_fuchsia_test.dart
@@ -486,6 +486,15 @@ bool testFileOpenDirectoryFails() {
   }
 }
 
+
+Future testListInterfaces() async {
+  List<NetworkInterface> interfaces = await NetworkInterface.list();
+  print('Found ${interfaces.length} interfaces:');
+  for (var iface in interfaces) {
+    print('\t$iface');
+  }
+}
+
 main(List<String> args) async {
   if (args.length >= 1) {
     if (args[0] == "infinite-loop") {
@@ -559,5 +568,9 @@ main(List<String> args) async {
     print("testFileOpenDirectoryFails FAILED");
   }
 
+  print('testListInterfaces');
+  await testListInterfaces();
+  print('testListInterfaces done');
+
   print("Goodbyte, Fuchsia!");
 }