Add sepolicy write permissions to pixelstats-vendor for charge_stats

Bug: 165833837
Test: Connect and disconnect the device. Ensure that there are
no unexpected errors for charge stats with 'logcat | grep pixelstats'

Signed-off-by: Jenny Ho <hsiufangho@google.com>
Change-Id: I546954c3f3a4dab188506f89bcea58dd5ed46d96
(cherry picked from commit 9eeddc3e681f1831aaf836ced048d922b50ac7cf)
diff --git a/vendor/google/pixelstats_vendor.te b/vendor/google/pixelstats_vendor.te
index 275e6b9..09169cc 100644
--- a/vendor/google/pixelstats_vendor.te
+++ b/vendor/google/pixelstats_vendor.te
@@ -1,2 +1,3 @@
 allow pixelstats_vendor sysfs_typec_info:dir search;
 allow pixelstats_vendor sysfs_typec_info:file r_file_perms;
+allow pixelstats_vendor sysfs_batteryinfo:file rw_file_perms;