Define policy for new StorageStatsManager API.

Test: builds
Bug: 32206268
Change-Id: I236105b029178f96da519c2295c66c686dcae7cb
diff --git a/private/service_contexts b/private/service_contexts
index 5414f11..23b2e28 100644
--- a/private/service_contexts
+++ b/private/service_contexts
@@ -134,6 +134,7 @@
 soundtrigger                              u:object_r:voiceinteraction_service:s0
 statusbar                                 u:object_r:statusbar_service:s0
 storaged                                  u:object_r:storaged_service:s0
+storagestats                              u:object_r:storagestats_service:s0
 SurfaceFlinger                            u:object_r:surfaceflinger_service:s0
 task                                      u:object_r:task_service:s0
 telecom                                   u:object_r:telecom_service:s0