Port custom_tabs_client from GYP to GN

tools/android/customtabs_benchmark/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.
 
 import("//build/config/android/rules.gni")
 
-assert(is_android)
-
-android_library("android_swipe_refresh_java") {
+android_apk("customtabs_benchmark_apk") {
   DEPRECATED_java_in_dir = "java/src"
+  android_manifest = "java/AndroidManifest.xml"
+  apk_name = "CustomTabsBenchmark"
   deps = [
-    "//third_party/android_tools:android_support_v13_java",
+    "//third_party/custom_tabs_client:custom_tabs_support_lib",
   ]
 }