Add infrastructure to run tests on android.

mojo/edk/embedder/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.
 
 source_set("embedder") {
   # This isn't really a standalone target; it must be linked into the
   # mojo_system_impl component.
   visibility = [ "//mojo/edk/system" ]
 
   sources = [
@@ skipping 65 matching lines @@
   configs += [ "//mojo/edk/system:system_config" ]
 
   deps = [ "//base" ]
 }
 
 source_set("embedder_unittests") {
   testonly = true
   visibility = [ "//mojo/edk/system:mojo_system_unittests" ]
 
   sources = [
+    "embedder_test_util.cc",
+    "embedder_test_util.h",
     "embedder_unittest.cc",
     "platform_channel_pair_posix_unittest.cc",
     "simple_platform_shared_buffer_unittest.cc",
   ]
 
+  if (!is_android) {
+    sources += [
+      "embedder_multiprocess_unittest.cc",
+    ]
+  }
+
   deps = [
     "//base",
     "//base/test:test_support",
     "//mojo/edk/test:test_support",
     "//mojo/edk/system",
     "//testing/gtest",
   ]
 }