Add HAL APIs for WiFi CHRE NAN RTT

1. Add new APIs to enable/disable CHRE NAN RTT
2. Add a new API to register callback.
   This callback should report events from WLAN driver for CHRE.

Test: New APIs work fine
Bug: 206614765
Change-Id: I8c8ab002064a9556be2e7d3972703bb3255a3a41