audio: Preserve 'usecase' for in IModule::setAudioPortConfig am: b06a492bd9 am: 3d575cacdb

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/2992650

Change-Id: Ib26f3cef2069c71976b087e9f803717ff73f4519
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>