grant google_battery access to debugfs_batteryinfo

Bug: 148034781
Test: boot and find no related error log
Change-Id: Iff8be1ab95077b555a04886ced62a72e93290386
diff --git a/vendor/google/kernel.te b/vendor/google/kernel.te
new file mode 100644
index 0000000..8e9ce4e
--- /dev/null
+++ b/vendor/google/kernel.te
@@ -0,0 +1 @@
+allow kernel debugfs_batteryinfo:dir search;