Add infrastructure to run tests on android.

mojo/edk/system/BUILD.gn

Index: mojo/edk/system/BUILD.gn
diff --git a/mojo/edk/system/BUILD.gn b/mojo/edk/system/BUILD.gn
index d0bfda78875e957f52691f703b87addde39269f7..c25ce8b8419f02ac83d62063f1c040e2245daf10 100644
--- a/mojo/edk/system/BUILD.gn
+++ b/mojo/edk/system/BUILD.gn
@@ -2,6 +2,11 @@
 # 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")
+  import("//build/config/android/rules.gni")
+}
+
 config("system_config") {
   defines = [
     # Ensures that dependent projects import the core functions on Windows.
@@ -98,7 +103,6 @@ component("system") {
   allow_circular_includes_from = [ "//mojo/edk/embedder" ]
 }
 
-# GYP version: mojo/edk/mojo_edk.gyp:mojo_system_unittests
 test("mojo_system_unittests") {
   sources = [
     "../test/multiprocess_test_helper_unittest.cc",
@@ -141,10 +145,15 @@ test("mojo_system_unittests") {
     "//testing/gtest",
   ]
 
+  if (is_android) {
+    deps += [
+      "//testing/android:native_test_native_code",
+    ]
+  }
+
   allow_circular_includes_from = [ "//mojo/edk/embedder:embedder_unittests" ]
 }
 
-# GYP version: mojo/edk/mojo_edk.gyp:mojo_message_pipe_perftests
 test("mojo_message_pipe_perftests") {
   sources = [
     "message_pipe_perftest.cc",
@@ -163,3 +172,12 @@ test("mojo_message_pipe_perftests") {
     "//testing/gtest",
   ]
 }
+
+if (is_android) {
+  unittest_apk("mojo_system_unittests_apk") {
+    deps = [
+      ":mojo_system_unittests",
+    ]
+    unittests_dep = ":mojo_system_unittests"
+  }
+}