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_contexts b/private/service_contexts
index a617016..6d48a74 100644
--- a/private/service_contexts
+++ b/private/service_contexts
@@ -227,6 +227,7 @@
 external_vibrator_service                 u:object_r:external_vibrator_service:s0
 ethernet                                  u:object_r:ethernet_service:s0
 face                                      u:object_r:face_service:s0
+feature_flags                             u:object_r:feature_flags_service:s0
 file_integrity                            u:object_r:file_integrity_service:s0
 fingerprint                               u:object_r:fingerprint_service:s0
 font                                      u:object_r:font_service:s0