Fix netd_aidl_interface compatible problem

Both of services.net and services.core statically link
netd_aidl_interface. But they use different version.
Since services.core already include service.net, removing
netd_aidl_interface from service.core.

Bug: 143560726
Bug: 139280289
Test: -build, flash, boot
      -Off/On tethering

Change-Id: Ifa83880ee7ee88ed67f8b638228ef1b0887e201e