Revert "netfilter: conntrack: don't refresh sctp entries in closed state"

This reverts commit ba4b4035 which is
commit 77b33719 upstream.

It breaks the Android ABI so revert it for now, if it is needed in the
future, it can be brought back in an ABI-safe way.

Bug: 161946584
Change-Id: If3f36646d15e1f27e51b5bdb57952bf59361462d
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>