[NAN] NAN data-path API: network specifier

Adds network specifier API. These are used in creating a connectivity
request through ConnectivityManager. The network specifier provides
mechanism to pass information to the network factory.

Bug: 26564277
Change-Id: Ib5b88685e033a2957644f2e9cff39a70712ac7b5
(cherry picked from commit 15849dc463278b44b191cd39aa7d31b0de9ee825)
2 files changed