SE Linux policies for OemLockService

Bug: 34766843
Test: gts-tradefed run gts -m GtsBootloaderServiceTestCases -t \
      com.google.android.bootloader.gts.BootloaderServiceTest
Change-Id: I8b939e0dbe8351a54f20c303921f606c3462c17d
diff --git a/private/service_contexts b/private/service_contexts
index db2e9f6..b00579a 100644
--- a/private/service_contexts
+++ b/private/service_contexts
@@ -103,6 +103,7 @@
 network_time_update_service               u:object_r:network_time_update_service:s0
 nfc                                       u:object_r:nfc_service:s0
 notification                              u:object_r:notification_service:s0
+oem_lock                                  u:object_r:oem_lock_service:s0
 otadexopt                                 u:object_r:otadexopt_service:s0
 overlay                                   u:object_r:overlay_service:s0
 package                                   u:object_r:package_service:s0