audio VTS: Refactor test parameter generation for I/O streams am: 1e703f182e am: a4c937fe91 am: 1d8b62bf92 am: 2d86511613

Original change: https://googleplex-android-review.googlesource.com/c/platform/hardware/interfaces/+/19340459

Change-Id: Iaa658e82356acbd72956c1f5c0b00c5a29bde97c
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>