storage: allow vold to access read_ahead_kb sysfs

Bug: 263305225
Change-Id: Id44f50ce3159394436db2b3e26f034f36867ac5c
Signed-off-by: Randall Huang <huangrandall@google.com>
diff --git a/storage/vold.te b/storage/vold.te
new file mode 100644
index 0000000..0e40127
--- /dev/null
+++ b/storage/vold.te
@@ -0,0 +1,2 @@
+allow vold sysfs_scsi_devices_0000:file rw_file_perms;
+