hal: correct offload tear down check due to sw effect

This is a subsidiary bug fix of the following incomplete one.

- audio: don't allow track offloaded if there's active sw effect
- Change-Id: Idf76374a3fd721eee595a8a9f6197a47a3c25e1c

CRs-Fixed: 984621
Change-Id: I8997f49560550d4174e1146340e0cd4d33957b24