diff --git a/aosp/hardware_android.h b/aosp/hardware_android.h
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+++ b/aosp/hardware_android.h
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+//
+// 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_AOSP_HARDWARE_ANDROID_H_
+#define UPDATE_ENGINE_AOSP_HARDWARE_ANDROID_H_
+
+#include <string>
+#include <string_view>
+
+#include <base/macros.h>
+#include <base/time/time.h>
+#include <gtest/gtest_prod.h>
+
+#include "update_engine/common/error_code.h"
+#include "update_engine/common/hardware.h"
+#include "update_engine/common/hardware_interface.h"
+
+namespace chromeos_update_engine {
+
+// Implements the real interface with the hardware in the Android platform.
+class HardwareAndroid : public HardwareInterface {
+ public:
+  HardwareAndroid() = default;
+  ~HardwareAndroid() override = default;
+
+  // HardwareInterface methods.
+  bool IsOfficialBuild() const override;
+  bool IsNormalBootMode() const override;
+  bool AreDevFeaturesEnabled() const override;
+  bool IsOOBEEnabled() const override;
+  bool IsOOBEComplete(base::Time* out_time_of_oobe) const override;
+  std::string GetHardwareClass() const override;
+  std::string GetDeviceRequisition() const override;
+  int GetMinKernelKeyVersion() const override;
+  int GetMinFirmwareKeyVersion() const override;
+  int GetMaxFirmwareKeyRollforward() const override;
+  bool SetMaxFirmwareKeyRollforward(int firmware_max_rollforward) override;
+  bool SetMaxKernelKeyRollforward(int kernel_max_rollforward) override;
+  int GetPowerwashCount() const override;
+  bool SchedulePowerwash(bool save_rollback_data) override;
+  bool CancelPowerwash() override;
+  bool GetNonVolatileDirectory(base::FilePath* path) const override;
+  bool GetPowerwashSafeDirectory(base::FilePath* path) const override;
+  int64_t GetBuildTimestamp() const override;
+  bool AllowDowngrade() const override;
+  bool GetFirstActiveOmahaPingSent() const override;
+  bool SetFirstActiveOmahaPingSent() override;
+  void SetWarmReset(bool warm_reset) override;
+  [[nodiscard]] std::string GetVersionForLogging(
+      const std::string& partition_name) const override;
+  [[nodiscard]] ErrorCode IsPartitionUpdateValid(
+      const std::string& partition_name,
+      const std::string& new_version) const override;
+
+ private:
+  FRIEND_TEST(HardwareAndroidTest, IsKernelUpdateValid);
+
+  // Helper for IsPartitionUpdateValid.
+  static ErrorCode IsKernelUpdateValid(const std::string& old_release,
+                                       const std::string& new_release);
+
+  DISALLOW_COPY_AND_ASSIGN(HardwareAndroid);
+};
+
+}  // namespace chromeos_update_engine
+
+#endif  // UPDATE_ENGINE_AOSP_HARDWARE_ANDROID_H_