Migrate to upstream policy version 30

Grant untrusted_app and isolated_app unpriv_sock_perms, neverallow
priv_sock_perms to disallow access to MAC address and ESSID.

Change-Id: Idac3b657a153e7d7fdc647ff34b876a325d759b3
diff --git a/Android.mk b/Android.mk
index 102b2b1..91d6303 100644
--- a/Android.mk
+++ b/Android.mk
@@ -5,7 +5,7 @@
 # SELinux policy version.
 # Must be <= /sys/fs/selinux/policyvers reported by the Android kernel.
 # Must be within the compatibility range reported by checkpolicy -V.
-POLICYVERS ?= 29
+POLICYVERS ?= 30
 
 MLS_SENS=1
 MLS_CATS=1024