Floss: Fix handle_set_terminated

Some controllers will send the the HCI event
HCI_LE_Advertising_Set_Terminated with the status
HCI_ERROR_CANCELLED_BY_HOST when the host stops the advertisement.

This event is NOT generated when the host stops the advertisement.
Refer to the BT spec ver 5.3 vol 4 part E sec 7.7.65.18. Note that the
section was revised from BT spec ver 5.0 vol 2 part E sec 7.7.65.18
which was ambiguous about.

Bug: 261410147
Test: Manually
Tag: #floss

Change-Id: I6c3bd5fe084faac23edca75bc0be799272f27a1c