Implement public methods of ICarPowerPolicyServer

- This CL is a partial implementation of CarPowerPolicyServer.
- It implements public methods of ICarPowerPolicyServer.

Bug: 162599168
Test: build okay and manual test
Change-Id: I35bdd819766e3c3f7c3f073a7294098b60b671a7
diff --git a/car_product/build/car_base.mk b/car_product/build/car_base.mk
index 9db42b9..b230bab 100644
--- a/car_product/build/car_base.mk
+++ b/car_product/build/car_base.mk
@@ -101,3 +101,6 @@
 
 # Enable car watchdog
 include packages/services/Car/cpp/watchdog/product/carwatchdog.mk
+
+# Enable car power policy
+include packages/services/Car/cpp/powerpolicy/product/carpowerpolicy.mk