"02:00:00:00:00:00" invalid for MAC randomization

Since we are using "02:00:00:00:00:00" as the default/invalid MAC
address in the Wifi Framework, we should make it invalid for Connected
MAC Randomization for consistency.

Updated the configuration to use "02:00:00:00:00:00" as the default
invalid MAC and attempt multiple time to generate valid random MAC.

Bug: 74436465
Bug: 74446723
Test: Unittest
Change-Id: Ia5ac806d478191d7e8fad247d5c3a1b97d16498f