pixelstats: allow zram's stats

Allow pixelstats access zram's stats.

Test: manually confirmed with printf it parses right values
Bug: 132938535
Signed-off-by: Minchan Kim <minchan@google.com>
Change-Id: Ibef9fa853f984ad23518d47271b3adb2b550537a
diff --git a/pixelstats/pixelstats_vendor.te b/pixelstats/pixelstats_vendor.te
index 67defe0..e5ddfb9 100644
--- a/pixelstats/pixelstats_vendor.te
+++ b/pixelstats/pixelstats_vendor.te
@@ -6,3 +6,6 @@
 
 allow pixelstats_vendor fwk_stats_hwservice:hwservice_manager find;
 binder_call(pixelstats_vendor, stats_service_server)
+
+allow pixelstats_vendor sysfs_zram:dir search;
+allow pixelstats_vendor sysfs_zram:file r_file_perms;