Reduce accessibility of voiceinteraction_service.

The services under this label are not meant to be exposed to all apps.
Currently only priv_app needs access.

Bug: 26799206
Change-Id: I07c60752d6ba78f27f90bf5075bcab47eba90b55

priv_app.te

@@ -29,6 +29,7 @@ allow priv_app surfaceflinger_service:service_manager find;
 allow priv_app app_api_service:service_manager find;
 allow priv_app system_api_service:service_manager find;
 allow priv_app persistent_data_block_service:service_manager find;
+allow priv_app voiceinteraction_service:service_manager find;
 
 # Traverse into /mnt/media_rw for bypassing FUSE daemon
 # TODO: narrow this to just MediaProvider

service.te

@@ -98,7 +98,7 @@ type usagestats_service, app_api_service, system_server_service, service_manager
 type usb_service, app_api_service, system_server_service, service_manager_type;
 type user_service, app_api_service, system_server_service, service_manager_type;
 type vibrator_service, app_api_service, system_server_service, service_manager_type;
-type voiceinteraction_service, app_api_service, system_server_service, service_manager_type;
+type voiceinteraction_service, system_server_service, service_manager_type;
 type wallpaper_service, app_api_service, system_server_service, service_manager_type;
 type webviewupdate_service, app_api_service, system_server_service, service_manager_type;
 type wifip2p_service, app_api_service, system_server_service, service_manager_type;