floss: Add advertise set-scan-rsp command

`advertise set-scan-rsp <enable|disable>` enables or disables
scan response data of active advertising sets.

Bug: 233128828
Tag: #floss
Test: build.py --target test
Test: manual test with btclient
Change-Id: I73efe1a9f506474120c97b9b2753d1d19b90fd4f