libaudiohal@aidl: Change the criteria for patch matching

The framework may use one device when creating a stream, and then
issue a create audio patch command with a different device but the
same mix port. In this case, the patch created with the stream must be
reused, matching it by the mix port only.

Bug: 333829626
Bug: 336984723
Bug: 337971166
Test: repro steps in bugs
Change-Id: I71a32087afaef2a5b20e4fba514297c0052fa4c8