Rationalize Dart mojo and sky package structure

sky/sdk/lib/framework/embedder.dart

Index: sky/sdk/lib/framework/embedder.dart
diff --git a/sky/framework/embedder.dart b/sky/sdk/lib/framework/embedder.dart
similarity index 93%
rename from sky/framework/embedder.dart
rename to sky/sdk/lib/framework/embedder.dart
index 702b49da8f4494f28f0f14e7513b1cf4cd921bdb..22fb423612e99c3ab6a96a60093760d2436d4a80 100644
--- a/sky/framework/embedder.dart
+++ b/sky/sdk/lib/framework/embedder.dart
@@ -2,10 +2,10 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-import "package:mojo/public/dart/application.dart";
+import "package:mojo/application.dart";
 import "dart:sky.internals" as internals;
-import "package:mojo/public/dart/bindings.dart" as bindings;
-import "package:mojo/public/dart/core.dart" as core;
+import "package:mojo/bindings.dart" as bindings;
+import "package:mojo/core.dart" as core;
 import "package:mojom/mojo/service_provider.mojom.dart";
 import "package:mojom/mojo/shell.mojom.dart";
 import "package:mojom/mojo/service_registry.mojom.dart";