Every error thrown leaked a netlink NETFILTER socket.
Test: as follows
- built, flashed, booted
- runtest frameworks-net passes
- enabled tethering and tried to cause conntrack updates to sessions
that had expired (which causes ErrnoExceptions to be thrown)
while monitoring lsof for system_server's NETFILTER sockets
Bug: 32163131
Bug: 64976634
Bug: 110122306
Merged-In: Id25f948b6b4d25ac033d9b608ab4a6b474f2c606
Merged-In: I212cbbe134bba4580a6e73de9bb77e712d25c9a6
Change-Id: Ib52b812e8434c27ad9f2596666400c13e03c2216
3c0dc27a4d