Add scanning exemption for CDM associated devices

If a device is associated via CDM, allow its app to
find it via BLE scans even if the app itself cannot see
other scan results due to location access being blocked.

Bug: 157051467
Tag: #compatibility
Test: nRF connect: block location - no results...associate via CDM - has
result

Change-Id: I1632c627fb16e1a9b9d9b2b985cf649690afe1c6
Merged-In: I1632c627fb16e1a9b9d9b2b985cf649690afe1c6