Expose sky KeyboardService in android mojo_shell

sky/framework/shell.dart

Index: sky/framework/shell.dart
diff --git a/sky/framework/shell.dart b/sky/framework/shell.dart
index d48a6f8c23caf4a877c555c41a04aff87e7cd502..6b6af4b53e4a4d97ce73598331aa22291473b6f6 100644
--- a/sky/framework/shell.dart
+++ b/sky/framework/shell.dart
@@ -3,6 +3,7 @@
 // found in the LICENSE file.
 
 import "dart:sky.internals" as internals;
+import "embedder.dart";
 import "package:mojo/public/dart/application.dart";
 import 'package:mojo/public/dart/core.dart' as core;
 import "package:mojo/service_provider.mojom.dart";
@@ -11,13 +12,14 @@ ApplicationConnection _initConnection() {
   int rawHandle = internals.takeServicesProvidedByEmbedder();
   core.MojoHandle proxyHandle = new core.MojoHandle(rawHandle);
   ServiceProviderProxy serviceProvider = null;
-  if (proxyHandle.isValid)
-    serviceProvider = new ServiceProviderProxy.fromHandle(proxyHandle);
+  if (proxyHandle.isValid) serviceProvider =
+      new ServiceProviderProxy.fromHandle(proxyHandle);
   return new ApplicationConnection(null, serviceProvider);
 }
 
 final ApplicationConnection _connection = _initConnection();
 
-void requestService(Object proxy) {
-  _connection.requestService(proxy);
+void requestService(String url, Object proxy) {
+  if (embedder.shell == null) _connection.requestService(proxy);
+  else embedder.connectToService(url, proxy);
 }