Add selinux policy for ext4 fs-verity feature

avc: denied { read } for comm="init" name="verity" dev="sysfs" ino=44746
scontext=u:r:init:s0 tcontext=u:object_r:sysfs_fs_ext4_features:s0 tclass=file
permissive=0

Bug: 117437571
Test: bootable for phone projects
Change-Id: I4c53e03ec55c2064f1b23c0cbd0302de3f8aa38e

public/init.te

@@ -356,6 +356,7 @@ allow init {
 
 allow init {
   sysfs_dt_firmware_android
+  sysfs_fs_ext4_features
 }:file r_file_perms;
 
 allow init {