User separate method to generate random mac

Bug: 142035508
Test: atest com.android.server.wifi
Change-Id: I0888e4a64ffa2e2c97829e9dd25121c6042a0bc4
4 files changed
tree: 77f4f639a7889130e207904ad53721266d1673af
  1. apex/
  2. service/
  3. metrics_pdd_hook.py
  4. PREUPLOAD.cfg