Merge "SonivoxTest: Use MediaPreparer to download test files" into main am: 5e9ae01ee1 am: 40c2ce9eb4

Original change: https://android-review.googlesource.com/c/platform/external/sonivox/+/2773024

Change-Id: Idd602e6a80db8c1fd3fc6a31132bcbefc04dfa9e
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>