Port custom_tabs_client from GYP to GN

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 = [ "ndk/sources/android/cpufeatures" ]
 }
 
@@ skipping 31 matching lines @@
 }
 
 android_java_prebuilt("android_support_design_java") {
   deps = [
     ":android_support_v7_appcompat_java",
     ":android_support_design_resources",
   ]
   jar_path = "$android_sdk_root/extras/android/support/design/libs/android-support-design.jar"
 }
 
+android_java_prebuilt("android_support_annotations_javalib") {
+  jar_path = "$android_sdk_root/extras/android/support/annotations/android-support-annotations.jar"
+}
+
 java_prebuilt("android_support_multidex_java") {
   supports_android = true
   jar_path = "$android_sdk_root/extras/android/support/multidex/library/libs/android-support-multidex.jar"
 }
 
 android_java_prebuilt("android_support_v13_java") {
   jar_path =
       "$android_sdk_root/extras/android/support/v13/android-support-v13.jar"
 }
 
@@ skipping 57 matching lines @@
     ":android_support_v13_java",
     ":android_support_v7_mediarouter_java",
     ":google_play_services_default_resources",
     ":legacy_http_javalib",
   ]
   proguard_preprocess = true
   proguard_config = "//third_party/android_tools/proguard.flags"
 
   # TODO(dgn) deps should not complain about having a custom action here
   # Currently, there is no guarantee that the data_deps actions will complete before the current one runs
-  data_deps = [ ":check_sdk_extras_version" ]
+  data_deps = [
+    ":check_sdk_extras_version",
+  ]
   jar_path = "$android_sdk_root/extras/google/google_play_services/libproject/google-play-services_lib/libs/google-play-services.jar"
 }
 
 action("check_sdk_extras_version") {
   script = "//build/check_sdk_extras_version.py"
   args = [
     "--package-id",
     "extra-google-google_play_services",
     "--package-location",
     rebase_path("$android_sdk_root/extras/google/google_play_services"),
     "--stamp",
     rebase_path("$target_gen_dir/checked_sdk_extras_version.stamp"),
   ]
   inputs = [
     "//build/android_sdk_extras.json",
     "$android_sdk_root/extras/google/google_play_services/source.properties",
   ]
   outputs = [
     "$target_gen_dir/checked_sdk_extras_version.stamp",
   ]
 }
 
 # TODO(jbudorick): Remove this once net_java_test_support no longer needs it.
 android_java_prebuilt("legacy_http_javalib") {
   jar_path = "$android_sdk/optional/org.apache.http.legacy.jar"
 }