Fix sky build on android

sky/engine/public/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("//tools/grit/grit_rule.gni")
 
-if (!is_android) {
-
 group("blink") {
   deps = [
     ":sky_headers",
     ":sky_minimal",
     "//sky/engine/web",
     "//sky/engine/platform",
   ]
 }
 
 # This target provides a minimal set of Blink APIs such as WebString to use in
 # places that cannot link against the full Blink library.  FIXME: We really
 # shouldn't have this at all and should instead remove all uses of Blink's API
 # types from places that can't link against Blink. crbug.com/248653
 group("sky_minimal") {
   deps = [
     "//sky/engine/platform:sky_common",
   ]
 }
 
 group("test_support") {
   deps = [
     "//sky/engine/web:test_support",
   ]
 }
 
-}  # !is_android
-
 config("sky_headers_config") {
   include_dirs = [ ".." ]
 }
 
 # Depend on this target to use public sky API headers for things like enums
 # and public structures without actually linking against any Blink libraries.
 source_set("sky_headers") {
   direct_dependent_configs = [
     ":sky_headers_config",
   ]
 }