Introduce brillo binder interface

This is more or less an exact analogue of the DBus interface, but
available over binder. We also add support to the client library and let
update_engine_client build with binder. We don't yet support an
equivalent of the status signal/the HandleStatusUpdate method. That will
come in a future CL.

Bug: 25908638
TEST=Verified update_engine_client functionality

Change-Id: Ic793619c8019b0d50aa184e0f592b6a9ab71e0b0
diff --git a/binder_service_android.h b/binder_service_android.h
new file mode 100644
index 0000000..3c4939a
--- /dev/null
+++ b/binder_service_android.h
@@ -0,0 +1,53 @@
+//
+// Copyright (C) 2015 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+#ifndef UPDATE_ENGINE_BINDER_SERVICE_ANDROID_H_
+#define UPDATE_ENGINE_BINDER_SERVICE_ANDROID_H_
+
+#include <vector>
+
+#include <utils/Errors.h>
+#include <utils/String16.h>
+#include <utils/StrongPointer.h>
+
+#include "android/os/BnUpdateEngine.h"
+#include "android/os/IUpdateEngineCallback.h"
+
+namespace chromeos_update_engine {
+
+class BinderService : public android::os::BnUpdateEngine {
+ public:
+  BinderService() = default;
+  virtual ~BinderService() = default;
+
+  android::binder::Status applyPayload(
+      const android::String16& url,
+      const std::vector<android::String16>& header_kv_pairs) override;
+
+  android::binder::Status bind(
+      const android::sp<android::os::IUpdateEngineCallback>& callback,
+      bool* return_value) override;
+
+  android::binder::Status suspend() override;
+
+  android::binder::Status resume() override;
+
+  android::binder::Status cancel() override;
+};  // class BinderService
+
+}  // namespace chromeos_update_engine
+
+#endif  // UPDATE_ENGINE_BINDER_SERVICE_ANDROID_H_