Allow linkerconfig to read apex-info-file.xml

Linkerconfig reads apex-info-list.xml to distinguish vendor apexes.

Bug: 159576928
Test: build & device boots
Change-Id: I1b791f9c03bbdfa5258eea5e7cb0896168beb114
diff --git a/private/linkerconfig.te b/private/linkerconfig.te
index 414b39f..3e08e42 100644
--- a/private/linkerconfig.te
+++ b/private/linkerconfig.te
@@ -16,4 +16,7 @@
 # Allow linkerconfig to scan for apex modules
 allow linkerconfig apex_mnt_dir:dir r_dir_perms;
 
+# Allow linkerconfig to read apex-info-list.xml
+allow linkerconfig apex_info_file:file r_file_perms;
+
 neverallow { domain -init -linkerconfig } linkerconfig_exec:file no_x_file_perms;