audio VTS: Refactor test parameter generation for I/O streams am: 1e703f18 am: a4c937fe

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



Change-Id: I90ecfde0791b877a88ac872239d4f254f91fc6f4
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>