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

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

Change-Id: Ie639a0ad4ea179ecd3ccec2ebe74b071dd61e3f7
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>