Make it possible to build url/ without ICU on android.

url/url_srcs.gypi

 # 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.
 
 {
   'variables': {
     'gurl_sources': [
+      'android/url_jni_registrar.cc',
+      'android/url_jni_registrar.h',
       'gurl.cc',
       'gurl.h',
       'origin.cc',
       'origin.h',
       'third_party/mozilla/url_parse.cc',
       'third_party/mozilla/url_parse.h',
       'url_canon.h',
       'url_canon_etc.cc',
       'url_canon_filesystemurl.cc',
       'url_canon_fileurl.cc',
@@ skipping 13 matching lines @@
       'url_canon_stdstring.cc',
       'url_canon_stdurl.cc',
       'url_file.h',
       'url_parse_file.cc',
       'url_parse_internal.h',
       'url_util.cc',
       'url_util.h',
     ],
   },
 }