[Payment Request] Update the CurrencyStringFormatter to call the native impl.

components/payments/android/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/config.gni")
 import("//build/config/android/rules.gni")
 
 static_library("payments_jni") {
   sources = [
+    "currency_formatter_android.cc",
+    "currency_formatter_android.h",
     "payments_jni_registrar.cc",
   ]
   deps = [
     ":jni_headers",
+    "//base",
     "//components/payments:payment_request",
     "//components/payments:payment_validation",
   ]
 }
 
 generate_jni("jni_headers") {
   sources = [
+    "//chrome/android/java/src/org/chromium/chrome/browser/payments/CurrencyStringFormatter.java",
     "//chrome/android/java/src/org/chromium/chrome/browser/payments/PaymentValidator.java",
   ]
   jni_package = "payments"
 }