Add support for unknown Network to expectCallback

This patch allows not passing a network to expectCallback
to allow receiving a callback when the network isn't known.
This is supported in other expect* methods but somehow was
missed in this one.

Test: Ikev2VpnRunnerTest, which uses this ability
Change-Id: Ifd20dd8789ff8b277bac3a73ddd23e2fe9febbca
1 file changed
tree: 2770e0548a05d5beb47dd839238eb81378c9de20
  1. staticlibs/