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

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

Change-Id: I9982f748b1a6df5dbc93e760742b8f50b0d2dd14
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>