Return CarConfigurationService when requested.

getCarService() incorrectly did not have a case for when the car
configuration manager is requested.

Fixes: 79883507
Test: flash build and request the CarConfigurationManager from a sample
application.

Change-Id: I74bba238a23c18d2baf4651208aeedcdcdac4499
diff --git a/service/src/com/android/car/ICarImpl.java b/service/src/com/android/car/ICarImpl.java
index 654128b..9db071b 100644
--- a/service/src/com/android/car/ICarImpl.java
+++ b/service/src/com/android/car/ICarImpl.java
@@ -276,6 +276,8 @@
                 return mCarDrivingStateService;
             case Car.CAR_UX_RESTRICTION_SERVICE:
                 return mCarUXRestrictionsService;
+            case Car.CAR_CONFIGURATION_SERVICE:
+                return mCarConfigurationService;
             default:
                 Log.w(CarLog.TAG_SERVICE, "getCarService for unknown service:" + serviceName);
                 return null;