Enforce MAC address restrictions for priv apps.

Bug: 230733237
Test: atest NetlinkSocketTest NetworkInterfaceTest
  bionic-unit-tests-static CtsSelinuxTargetSdkCurrentTestCases
  CtsSelinuxTargetSdk29TestCases CtsSelinuxTargetSdk27TestCases
Change-Id: I1d66ae7849e950612f3b6693216ec8c84e942640
diff --git a/private/net.te b/private/net.te
index 25bd538..c2bac03 100644
--- a/private/net.te
+++ b/private/net.te
@@ -12,6 +12,7 @@
   netdomain
   -ephemeral_app
   -mediaprovider
+  -priv_app
   -sdk_sandbox
   -untrusted_app_all
 } self:netlink_route_socket { bind nlmsg_readpriv nlmsg_getneigh };