NNAPI SL Benchmark - Add option to specify vendor [5/n]. am: 6876a331e2 am: cbd75087f2 am: 4abe9a1398 am: 6328be970e

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

Change-Id: If72e703bce69c6ab5e12bdeee9759de62aacf56b
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>