Updating the Resolvable Private Address when advertising and
active scanning in progress fails and clears the RPA_VALID
flag; making the next bt_le_scan_start while continuing to
advertise to fail.
This is fixed by keeping the RPA_VALID flag remain set.
Stopping and starting active scanning to update RPA can be
implemented in a separate commit.
Fixes#9463.
Signed-off-by: Vinayak Kariappa Chettimada <vich@nordicsemi.no>
3353c9f3c8