NNAPI SL Benchmark - Add option to specify vendor [1/n]. am: 27de3f2169 am: ddd35c3056 am: be3a6408c2 am: 5a067fed90

Original change: https://android-review.googlesource.com/c/platform/test/mlts/benchmark/+/2096394

Change-Id: I3397299caf7884efbd5e05128bf33d18cf0d0f3a
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>