Move car service test cases to original package

Sharing package name between test and its target will require only
package-private API exposure instead of public.

Bug: 36189057

Test: runtest -x packages/services/Car/tests/carservice_test/

Change-Id: I3b0677c22d929f50b39d95dc0dc7b26d374236f1
diff --git a/service/src/com/android/car/ICarImpl.java b/service/src/com/android/car/ICarImpl.java
index d4acdb3..a513706 100644
--- a/service/src/com/android/car/ICarImpl.java
+++ b/service/src/com/android/car/ICarImpl.java
@@ -153,7 +153,7 @@
         mAllServices = allServices.toArray(new CarServiceBase[0]);
     }
 
-    public void init() {
+    void init() {
         traceBegin("VehicleHal.init");
         mHal.init();
         traceEnd();
@@ -164,7 +164,7 @@
         traceEnd();
     }
 
-    public void release() {
+    void release() {
         // release done in opposite order from init
         for (int i = mAllServices.length - 1; i >= 0; i--) {
             mAllServices[i].release();
@@ -172,7 +172,7 @@
         mHal.release();
     }
 
-    public void vehicleHalReconnected(IVehicle vehicle) {
+    void vehicleHalReconnected(IVehicle vehicle) {
         mHal.vehicleHalReconnected(vehicle);
         for (CarServiceBase service : mAllServices) {
             service.vehicleHalReconnected();