This fixes the failure to use a resolvable private address in this
scenario.
1. call `bt_le_oob_get_local`, will generate and mark RPA as valid
2. start connectable adv w/ IDENTITY bit
3. start connectable adv w/o IDENTITY
4. RPA is not set (in `bt_id_set_private_addr`) because RPA
is still marked as valid
When EXT_ADV is enabled and the controller supports it, a different code
path is taken that doesn't have this issue.
Unconditionally invalidating the RPA when starting advertising works around
this issue.
Fixes#56326
Signed-off-by: Jonathan Rico <jonathan.rico@nordicsemi.no>
931a089e2c