p2p: add HAL method to enable P2P random MAC address feature

There are compatibility issue with driver for P2P random MAC.
The framework needs to check driver capability first before enabling
P2P random MAC address feature.

Bug: 118904478
Test: vts - atest VtsHalWifiSupplicantP2pV1_2TargetTest
Test: manual test
      * Enter WiFI Direct Page
      * check the feature is enabled in logcat
        * WifiP2pService: Supported feature: P2P MAC randomization
      * check p2p0 MAC address is randomized.

Change-Id: I28e226e7d51e3d5e3e6013d3772e643c1df1ab54