system_server: allow access to proc/memhealth/*

Libmemevents requires read-access to the attribute files exposed by the
memhealth driver.

Test: build
Test: no denials to /proc/memhealth/oom_victim_list from libmemevents
Bug: 244232958
Change-Id: I617c75ab874ad948af37d3e345e5202e46781f3f
Signed-off-by: Carlos Galo <carlosgalo@google.com>
diff --git a/private/genfs_contexts b/private/genfs_contexts
index 759ac38..3d5c357 100644
--- a/private/genfs_contexts
+++ b/private/genfs_contexts
@@ -19,6 +19,7 @@
 genfscon proc /locks u:object_r:proc_locks:s0
 genfscon proc /lowmemorykiller u:object_r:proc_lowmemorykiller:s0
 genfscon proc /meminfo u:object_r:proc_meminfo:s0
+genfscon proc /memhealth u:object_r:proc_memhealth:s0
 genfscon proc /misc u:object_r:proc_misc:s0
 genfscon proc /modules u:object_r:proc_modules:s0
 genfscon proc /mounts u:object_r:proc_mounts:s0