RootCanal: Implement quirk to set a default LE random address

The specification states that the Random Address is invalid until
explicitly set by the command LE Set Random Address. Some HCI
commands have explicit checks for this condition.
Some controller implementations however do not enforce this.

The quirk is currently disabled.

Bug: 279443791
Test: m root-canal
Change-Id: Ib985c14827cf63c53567deac93041a70cff0c18a