Merge "Allow shell to read sysfs dirs."

am: 2fb38fc8

* commit '2fb38fc8':
  Allow shell to read sysfs dirs.

shell.te

@@ -121,6 +121,7 @@ allow shell self:process ptrace;
 
 # allow shell to get battery info
 allow shell sysfs_batteryinfo:file r_file_perms;
+allow shell sysfs:dir r_dir_perms;
 
 # Allow access to ion memory allocation device.
 allow shell ion_device:chr_file rw_file_perms;