Make /proc/sys/kernel/random available to everyone

am: 9d9c370f

Change-Id: I9499a44812b32f7f2cde3d069722d442d21ad6da

public/domain.te

@@ -77,6 +77,8 @@ allow { domain -servicemanager -vndservicemanager -isolated_app } hwbinder_devic
 allow domain ptmx_device:chr_file rw_file_perms;
 allow domain alarm_device:chr_file r_file_perms;
 allow domain random_device:chr_file rw_file_perms;
+allow domain proc_random:dir r_dir_perms;
+allow domain proc_random:file r_file_perms;
 allow domain properties_device:dir { search getattr };
 allow domain properties_serial:file r_file_perms;
 

public/update_engine_common.te

@@ -38,9 +38,8 @@ allow update_engine_common shell_exec:file rx_file_perms;
 # Allow update_engine_common to suspend, resume and kill the postinstall program.
 allow update_engine_common postinstall:process { signal sigstop sigkill };
 
-# access /proc/cmdline and /proc/sys/kernel/random/
+# access /proc/cmdline
 allow update_engine_common proc_cmdline:file r_file_perms;
-r_dir_file(update_engine_common, proc_random)
 
 # Read files in /sys/firmware/devicetree/base/firmware/android/
 r_dir_file(update_engine_common, sysfs_dt_firmware_android)