tree 7dc23444514ee772dc5337c47216eaf70c131e26
parent f887c7b9c45d6293d6d3d99a4ddffe272ce6ef88
author Jimmy Chen <jimmycmchen@google.com> 1543481203 +0800
committer Jimmy Chen <jimmycmchen@google.com> 1547521545 +0800

p2p: support random interface address

To enhance privacy, generate a ramdom interface for each group.

This need additional qcom driver fix because MAC changing function of
P2P_GO won't work properly.

There are two configurations are introduced:
* p2p_interface_random_mac_addr
  enable interface random MAC address feature, default disable.

Bug: 118904478
Test: manual test
      * enable WiFi Direct in Settings.
      * establish fresh connection between two peers.
      * establish reinvoke connection between two peers.
      * check interface addresses are random generated.
Test: CtsVerifier - WiFi Direct
      * Two random device address enabled device.
      * One random device address enabled device and
        One random device address disabled device.

Change-Id: I519629eb8520a15e6f2d158cf3b9a4058f66e124