Add required deps to third_party/android_support_test_runner

third_party/espresso/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("//build/config/android/rules.gni")
 
 android_java_prebuilt("espresso_contrib_java") {
+  testonly = true
   jar_path = "lib/espresso-contrib-2.2-release-no-dep.jar"
   deps = [
     ":espresso_core_java",
     "//third_party/guava:guava_java",
     "//third_party/hamcrest:hamcrest_core_java",
   ]
 }
 
 android_java_prebuilt("espresso_core_java") {
+  testonly = true
   jar_path = "lib/espresso-core-2.2-release-no-dep.jar"
   deps = [
     "//third_party/android_tools:android_support_annotations_java",
     "//third_party/guava:guava_java",
     "//third_party/hamcrest:hamcrest_core_java",
     "//third_party/javax_inject:javax_inject_java",
   ]
 }
 
 android_java_prebuilt("espresso_idling_java") {
+  testonly = true
   jar_path = "lib/espresso-idling-resource-2.2-release-no-dep.jar"
 }
 
 android_java_prebuilt("espresso_intents_java") {
+  testonly = true
   jar_path = "lib/espresso-intents-2.2-release-no-dep.jar"
   deps = [
     "//third_party/android_support_test_runner:runner_java",
     "//third_party/guava:guava_java",
     "//third_party/hamcrest:hamcrest_core_java",
   ]
 }
 
 android_java_prebuilt("espresso_web_java") {
+  testonly = true
   jar_path = "lib/espresso-web-2.2-release-no-dep.jar"
   deps = [
     ":espresso_core_java",
     "//third_party/guava:guava_java",
     "//third_party/hamcrest:hamcrest_core_java",
   ]
 }