audio VTS: Refactor test parameter generation for I/O streams am: 1e703f182e am: a4c937fe91 am: 9b052883b6 am: 2a872e4e2f

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

Change-Id: Idc0aa6747149a366e916ee93589f22957a1450df
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>