Tighten up handling of new classes

1b1d133be5350989cbd6c09e4f000e146f9ab7ae added the process2 class but
forgot to suppress SELinux denials associated with these permissions
for the su domain. Suppress them.

Ensure xdp_socket is in socket_class_set, so the existing dontaudit rule
in su.te is relevant. Inspired by
https://github.com/SELinuxProject/refpolicy/commit/66a337eec6d7244e44e51936835b4e904f275a02

Add xdp_socket to various other neverallow rules.

Test: policy compiles.
Change-Id: If5422ecfa0cc864a51dd69559a51d759e078c8e7
diff --git a/private/app_neverallows.te b/private/app_neverallows.te
index 79437bd..30acf87 100644
--- a/private/app_neverallows.te
+++ b/private/app_neverallows.te
@@ -93,7 +93,7 @@
   ax25_socket ipx_socket netrom_socket atmpvc_socket x25_socket rose_socket decnet_socket
   atmsvc_socket rds_socket irda_socket pppox_socket llc_socket can_socket tipc_socket
   bluetooth_socket iucv_socket rxrpc_socket isdn_socket phonet_socket ieee802154_socket caif_socket
-  alg_socket nfc_socket vsock_socket kcm_socket qipcrtr_socket smc_socket
+  alg_socket nfc_socket vsock_socket kcm_socket qipcrtr_socket smc_socket xdp_socket
 } *;
 
 # Do not allow untrusted apps access to /cache