Keep Cache implementation for Android Auto

The removal of the cache breaks android auto tests

test_mapping_presubmit_cloud_auto_car_services breaks because
of SELinux rules. The cache circumvents this.

Test: v2/aaos-engprod/test_mapping_presubmit_cloud_auto_car_services
Bug: 333854840
Flag: android.server.Flags.removeJavaServiceManagerCache
Change-Id: I420e718a4d8dc6f8e17652335997c31c310a406a