Move cpp projects into packages/services/Car/cpp

- Cpp projects running in machine codes are relocated to
packages/services/Car/cpp
- Relevant configs are changed accordingly

Bug: 162625217
Test: Build okay
Change-Id: Ie654bf66cde2e7bb8f9404d9e603a8af41511c34
diff --git a/car_product/build/car_base.mk b/car_product/build/car_base.mk
index d6b62bc..7754a63 100644
--- a/car_product/build/car_base.mk
+++ b/car_product/build/car_base.mk
@@ -87,4 +87,4 @@
     packages/services/Car/car_product/init/init.car.rc:system/etc/init/init.car.rc
 
 # Enable car watchdog
-include packages/services/Car/watchdog/product/carwatchdog.mk
+include packages/services/Car/cpp/watchdog/product/carwatchdog.mk