Move ranging_service se policy from public to private

Bug: 331206299
Test: manually verified with the image
Change-Id: I679705cae774f4c929850277927c0547f6660a69
diff --git a/private/service.te b/private/service.te
index dde4bd2..a90b3ba 100644
--- a/private/service.te
+++ b/private/service.te
@@ -64,6 +64,10 @@
 type wifi_mainline_supplicant_service, service_manager_type;
 type dynamic_instrumentation_service,  app_api_service, system_server_service, service_manager_type;
 
+is_flag_enabled(RELEASE_RANGING_STACK, `
+    type ranging_service, app_api_service, system_server_service, service_manager_type;
+')
+
 ###
 ### Neverallow rules
 ###