Return early if audio system doesn't support SAD feature

Signals that the audio system doesn't support the SAD feature:
- it sends a <Feature Abort>[Unrecognized Opcode]
- even after 2 tries, it still doesn't respond to the <Give SAD>
  messages

Test: atest and manually verified that the SAD feature returns early and the ARC connection is unblocked.
Bug: 232235947
Change-Id: I146fd24820537ea4957785b8eb0710ddb12b977b