DO NOT MERGE: Allow kernel to read proc

(cherry picked from commit 48d68a64)

Remove audit messaged.

Addresses:
avc:  granted  { read } for  pid=1 comm="init" name="cmdline" dev="proc" ino=4026535448 scontext=u:r:kernel:s0 tcontext=u:object_r:proc:s0 tclass=file
avc:  granted  { read open } for  pid=1 comm="init" path="/proc/cmdline" dev="proc" ino=4026535448 scontext=u:r:kernel:s0 tcontext=u:object_r:proc:s0 tclass=file

Bug: 28760354
Change-Id: I48ea01b35c6d1b255995484984ec92203b6083be

domain_deprecated.te

@@ -89,8 +89,8 @@ r_dir_file(domain_deprecated, cgroup)
 allow domain_deprecated proc_meminfo:file r_file_perms;
 r_dir_file(domain_deprecated, proc_net)
 #auditallow domain_deprecated proc:dir r_dir_perms; # r_dir_perms granted in domain
-auditallow { domain_deprecated -fsck -fsck_untrusted -init -logd -priv_app -rild -system_server -vold } proc:file r_file_perms;
-auditallow { domain_deprecated -fsck -fsck_untrusted -init -logd -priv_app -rild -system_server -vold } proc:lnk_file { open ioctl lock }; # getattr read granted in domain
+auditallow { domain_deprecated -fsck -fsck_untrusted -init -kernel -logd -priv_app -rild -system_server -vold } proc:file r_file_perms;
+auditallow { domain_deprecated -fsck -fsck_untrusted -init -kernel -logd -priv_app -rild -system_server -vold } proc:lnk_file { open ioctl lock }; # getattr read granted in domain
 auditallow { domain_deprecated -bluetooth -fingerprintd -healthd -init -netd -priv_app -rild -system_app -surfaceflinger -system_server -tee -ueventd -vold -wpa } sysfs:dir { open getattr read ioctl lock }; # search granted in domain
 auditallow { domain_deprecated -bluetooth -fingerprintd -healthd -init -netd -priv_app -rild -system_app -surfaceflinger -system_server -tee -ueventd -vold -wpa } sysfs:file r_file_perms;
 auditallow { domain_deprecated -bluetooth -fingerprintd -healthd -init -netd -priv_app -rild -system_app -surfaceflinger -system_server -tee -ueventd -vold -wpa } sysfs:lnk_file { getattr open ioctl lock }; # read granted in domain

kernel.te

@@ -5,6 +5,7 @@ allow kernel self:capability sys_nice;
 
 # Root fs.
 r_dir_file(kernel, rootfs)
+r_dir_file(kernel, proc)
 
 # Get SELinux enforcing status.
 allow kernel selinuxfs:dir r_dir_perms;