Revert "Do not allow apps to access network address file"

This reverts commit 2dabf174.

Change-Id: I7e35a6ea1b8d5958c65eb04a7c9a04ba807b1181

file.te

@@ -21,7 +21,6 @@ type sysfs_writable, fs_type, sysfs_type, mlstrustedobject;
 type sysfs_bluetooth_writable, fs_type, sysfs_type, mlstrustedobject;
 type sysfs_nfc_power_writable, fs_type, sysfs_type, mlstrustedobject;
 type sysfs_wake_lock, fs_type, sysfs_type;
-type sysfs_mac_address, fs_type, sysfs_type;
 # /sys/devices/system/cpu
 type sysfs_devices_system_cpu, fs_type, sysfs_type;
 # /sys/module/lowmemorykiller

system_server.te

@@ -417,9 +417,6 @@ allow system_server sdcard_type:dir { getattr search };
 # Traverse into expanded storage
 allow system_server mnt_expand_file:dir r_dir_perms;
 
-# Allow system process to read network MAC address
-allow system_server sysfs_mac_address:file r_file_perms;
-
 ###
 ### Neverallow rules
 ###

untrusted_app.te

@@ -142,6 +142,3 @@ neverallow untrusted_app mlstrustedsubject:process fork;
 # bugs, so we want to ensure untrusted_app never has this
 # capability.
 neverallow untrusted_app file_type:file link;
-
-# Do not allow untrusted_app to access network MAC address file
-neverallow untrusted_app sysfs_mac_address:file no_rw_file_perms;