Floss: Use current random address when reconnecting to LE device

Floss doesn't support LL privacy yet, so we can't let the controller
resolve the random addresses.

Therefore, choose to connect to the latest random address instead of
the identity address on LE reconnection.

Bug: 271827442
Test: CTSV BLE Encrypted Client Test
Change-Id: I6df1fabd80e2d95b972479f01c2ff3ad26e19c60