SE Linux perimissions for Feature Flags Service

Bug: 279054964
Test: build && flash
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:a1f8ca3cd3c4861a06c5042148aab6623a563651)
Merged-In: I5fffaccba61e218496ac82ccf9ba308cf9892868
Change-Id: I5fffaccba61e218496ac82ccf9ba308cf9892868
diff --git a/private/service.te b/private/service.te
index 8059bfb..f07400b 100644
--- a/private/service.te
+++ b/private/service.te
@@ -4,6 +4,7 @@
 type compos_service,                service_manager_type;
 type communal_service,              app_api_service, system_server_service, service_manager_type;
 type dynamic_system_service,        system_api_service, system_server_service, service_manager_type;
+type feature_flags_service,         app_api_service, system_server_service, service_manager_type;
 type gsi_service,                   service_manager_type;
 type incidentcompanion_service,     app_api_service, system_api_service, system_server_service, service_manager_type;
 type logcat_service,                system_server_service, service_manager_type;