Add dev option for enhanced mac randomization

This toggle will affect client mode mac randomization only.
When toggled on, during association to networks that have MAC
randomization turned on, a more random MAC (as opposed to persistent
MAC per-network) would be used.

Bug: 151983183
Test: Manual
Change-Id: I4affade362644037e649ac6cf93e6871a81058bc
4 files changed