Add content_shell_apk target (and a bunch of its dependencies)

components/crash/browser/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.
 
+if (is_android) {
+  import("//build/config/android/config.gni")
+}
+
 source_set("browser") {
   sources = [
     "crash_dump_manager_android.cc",
     "crash_dump_manager_android.h",
   ]
 
   if (is_linux || is_android) {
     set_sources_assignment_filter([])
     # Want this file on both Linux and Android.
     sources += [
@@ skipping 10 matching lines @@
   ]
 
   # This is not in the GYP build but this target includes breakpad client
   # headers, so add the dependency here.
   if (is_posix && !is_ios &&
              (!is_android || !is_android_webview_build)) {
     configs += [ "//breakpad:client_config" ]
     direct_dependent_configs = [ "//breakpad:client_config" ]
   }
 }