Restrict lmkd read access from sysfs_type to sysfs_lowmemorykiller.

Bug: 65643247
Test: device boots without denials from lmkd
Change-Id: I6db8b52a4fb3edefbcbc87d6ca5f1b76162e9dce

public/lmkd.te

@@ -18,7 +18,7 @@ r_dir_file(lmkd, system_server)
 allow lmkd system_server:file write;
 
 ## Writes to /sys/module/lowmemorykiller/parameters/minfree
-r_dir_file(lmkd, sysfs_type)
+r_dir_file(lmkd, sysfs_lowmemorykiller)
 allow lmkd sysfs_lowmemorykiller:file w_file_perms;
 
 # Send kill signals