Make HardwareChromeOS own debugd.

It only exists in Chrome OS, Brillo doesn't have it.

Test: ./update_engine_unittests
Bug: 28800946

Change-Id: I49d2024dbad5e0bf78bbc479f97dabb569b32c56
diff --git a/hardware_android.h b/hardware_android.h
index 88e00fa..78af871 100644
--- a/hardware_android.h
+++ b/hardware_android.h
@@ -36,6 +36,7 @@
   // 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;