floss: Add trait AdvertiseManagerOps

AdvertiseManagerOps defines the operations needed for the
AdvertiseManager stack to communicate with the upper/lower layers.
This is the preparation for the adv software rotation feature.

Bug: 320461529
Tag: #floss
Test: mmm packages/modules/Bluetooth
Test: bluetooth_AdapterAdvHealth.all_floss
Test: NS send/receive on LE EXT ADV supported device (cherry/tomato)
Test: NS receive on legacy device (nami/sona)
Flag: EXEMPT, Floss-only changes
Change-Id: Iccfd46b807a5a6b9e83399b3ed1ff3ee7e926961