[Android] Add an out-of-app instrumentation driver APK.

testing/android/broker/BUILD.gn

Index: testing/android/broker/BUILD.gn
diff --git a/testing/android/broker/BUILD.gn b/testing/android/broker/BUILD.gn
new file mode 100644
index 0000000000000000000000000000000000000000..8daa040832987bcfa031e5647af0336324e145a1
--- /dev/null
+++ b/testing/android/broker/BUILD.gn
@@ -0,0 +1,13 @@
+# Copyright 2015 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("//build/config/android/rules.gni")
+
+# GYP: //testing/android/on_device_instrumentation.gyp:broker_java
+android_library("broker_java") {
+  chromium_code = true
+
+  java_files =
+      [ "java/src/org/chromium/test/broker/OnDeviceInstrumentationBroker.java" ]
+}