NNAPI SL Benchmark - Add option to specify vendor [5/n]. am: 6876a331e2 am: cbd75087f2

Original change: https://android-review.googlesource.com/c/platform/test/mlts/benchmark/+/2096398

Change-Id: Ibaa5f30c7ac61f1cb6c0e553d7044e620848c235
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>