thermal: thermal_metrics: Update selinux to reset stats

Bug: 193833982
Test: Local build and verify statsD logs
adb shell cmd stats print-logs && adb logcat -b all | grep -i 105045
Change-Id: I0dc1c557797d7fe97da7f0fcb2d600485526c979
diff --git a/whitechapel_pro/pixelstats_vendor.te b/whitechapel_pro/pixelstats_vendor.te
index 48fd6e8..6aba16a 100644
--- a/whitechapel_pro/pixelstats_vendor.te
+++ b/whitechapel_pro/pixelstats_vendor.te
@@ -41,6 +41,7 @@
 #perf-metrics
 r_dir_file(pixelstats_vendor, sysfs_vendor_metrics)
 allow pixelstats_vendor sysfs_vendor_metrics:lnk_file r_file_perms;
+allow pixelstats_vendor sysfs_vendor_metrics:file w_file_perms;
 
 # BCL
 allow pixelstats_vendor sysfs_bcl:dir search;