Revert "Wifi MAC Randomization: Developer Options"

This reverts commit 8c6d8daa.

Reason for revert: <Enabling feature by default. Global flag moved to OEM
configurable overlay instead.>

Bug: 123408542
Test: unit tests
Test: Manual test to verify dev option is gone
Change-Id: Iae667a331b5d4fb4cb6fe07077eb9f3954f3089e