[RTT2] Add support for RTT with a Peer Wi-Fi Aware device

Add support for ranging to peer Wi-Fi Aware devices. These can
be specified either:
- In-band discovery using PeerHandle (which gets translated to a
  MAC address for ranging but masked back out when results are
  reported)
- Out-of-band discovery using a MAC address

Bug: 65015034
Test: unit tests + integration tests
Change-Id: I98f0bc06a0a408bc7fd543d564117fa303018adf
6 files changed