Create a separate method to get Mac Random Key

To support multiple profile for same network, getKey() may be changed.
Create a new method for random Mac generation to keep backward
compatibility and consistent address for same profile.

Bug: 142035508
Test: atest android.net.wifi
Change-Id: I23a1bbf3a74f13252799a1b36df31f9d3d8ea359
2 files changed