Selinux: Give lmkd read access to /proc/meminfo

Allow lmkd read access to /proc/meminfo for retrieving information
on memory state.

Bug: 75322373
Change-Id: I7cf685813a5a49893c8f9a6ac4b5f6619f3c18aa
Merged-In: I7cf685813a5a49893c8f9a6ac4b5f6619f3c18aa
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
(cherry picked from commit 76384b3e)

public/lmkd.te

@@ -43,6 +43,9 @@ allow lmkd domain:file { open read };
 # reboot because orderly shutdown may not be possible.
 allow lmkd proc_sysrq:file rw_file_perms;
 
+# Read /proc/meminfo
+allow lmkd proc_meminfo:file r_file_perms;
+
 ### neverallow rules
 
 # never honor LD_PRELOAD