[Android] Enable multidex for release builds of chrome_public_test_apk. (RELAND)

build/secondary/third_party/android_tools/BUILD.gn

 # Copyright 2014 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")
 
 config("cpu_features_include") {
   include_dirs = [ "$android_ndk_root/sources/android/cpufeatures" ]
 }
 
@@ skipping 175 matching lines @@
     ":android_support_v17_leanback_java",
     ":android_support_v4_java",
     ":android_support_v7_appcompat_java",
     ":android_support_v7_preference_java",
     ":android_support_v7_recyclerview_java",
   ]
   _lib_name = "preference-leanback-v17"
   aar_path = "$lib_path/$_lib_name/$lib_version/$_lib_name-$lib_version.aar"
 }
 
+android_library("android_support_chromium_java") {
+  testonly = true
+  java_files = [ "$android_sdk_root/extras/chromium/support/src/org/chromium/android/support/PackageManagerWrapper.java" ]
+}
+
 # TODO(dgn): Remove this once no other target has a dependency on it
 java_group("google_play_services_default_resources") {
   deps = []
 }
 
 # TODO(dgn): Remove this once other targets register dependencies on only the
 # modules they need.
 java_group("google_play_services_default_java") {
   deps = [
     ":google_play_services_auth_base_java",
@@ skipping 117 matching lines @@
 
 android_aar_prebuilt("google_play_services_vision_java") {
   deps = [
     ":google_play_services_base_java",
     ":google_play_services_basement_java",
   ]
   _lib_name = "play-services-vision"
   aar_path = "$gms_path/$_lib_name/$gms_version/$_lib_name-$gms_version.aar"
   ignore_manifest = true
 }