Connected MAC randomiation feature overlay

Add OEM feature overlay for this feature.
Disabled by default. Should be enabled per device after testing.

Bug: 122920200
Test: Unit tests
Test: flash device with the default value (false) and verify MAC
randomization is not working.
Test: flash with the device overlay which sets this to true and verify
that MAC randomization is working again.

Change-Id: I981fbfabca8f028be125c51bb559009e9992570e
2 files changed