Enable service_unittests on several bot configurations

services/BUILD.gn

 # Copyright 2016 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("//testing/test.gni")
 
 # One Big Target for services to register their unit test sources. This exists
 # to avoid having to maintain a separate test binary for every service.
 #
 # To add tests for a new service, please define a "tests" source_set in the
 # service subdirectory and add it as a dependency here.
 test("service_unittests") {
   deps = [
     "//services/image_decoder:tests",
     "//services/test:run_all_unittests",
   ]
+
+  if (is_android) {
+    # Some tests need to initialize V8.
+    deps += [ "//v8:v8_external_startup_data_assets" ]
+  }
 }