Update Stocks.apk build tech

sky/apk/stocks/BUILD.gn

Index: sky/apk/stocks/BUILD.gn
diff --git a/sky/apk/stocks/BUILD.gn b/sky/apk/stocks/BUILD.gn
deleted file mode 100644
index 1f5fd25dd7ce0b4d32c1836d479f55f97ef438ea..0000000000000000000000000000000000000000
--- a/sky/apk/stocks/BUILD.gn
+++ /dev/null
@@ -1,25 +0,0 @@
-# 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")
-import("//sky/apk/rules.gni")
-
-android_library("java") {
-  java_files = [ "org/domokit/stocks/StocksActivity.java" ]
-
-  deps = [
-    "//sky/shell:java",
-  ]
-}
-
-sky_apk("stocks") {
-  apk_name = "Stocks"
-  android_manifest = "AndroidManifest.xml"
-  deps = [
-    ":java",
-  ]
-}