NAN API update

NAN API update

Changes related to NAN APIs and structures.
1) Remove NanHeader
2) Replace wifi_handle with wifi_interface_handle in NAN APIs
3) Add publish/subscribe id
4) Remove match_handle and name it as requestor_instance_id
5) Add NanPublishResponse/NanSubscribeResponse structures
6) Remove user_context
7) Add appropriate enums
8) Remove unused structures
9) Add new NAN status types for TCA, Transmit, and invalid
   configuration of Band, DW/DB intervals, random factor
   update and scan period.
10) Add new fields in Publish/Subscribe Stats.
11) Replace wifi_request_id with transaction_id to have a
    common interface across all layers.

Bug: 26216681
Change-Id: Ife7cf7e7ed64d2f8db236f23919cd6412dc8b496