Fix Asteroids game to paint again and give it an icon.

sky/sdk/example/game/apk/BUILD.gn

 # Copyright 2015 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
+assert(is_android)
 
+import("//build/config/android/config.gni")
 import("//build/config/android/rules.gni")
 
-android_java_prebuilt("okio") {
-  jar_path = "okio-1.2.0.jar"
+android_resources("resources") {
+  resource_dirs = [ "res" ]
+  android_manifest = "AndroidManifest.xml"
 }
-
-android_java_prebuilt("okhttp") {
-  jar_path = "okhttp-2.2.0.jar"
-
-  deps = [
-    ":okio",
-  ]
-}