NNAPI SL Benchmark - Add option to specify vendor [3/n]. am: 3a8f029f72 am: a695f667e9

Original change: https://android-review.googlesource.com/c/platform/test/mlts/benchmark/+/2096396

Change-Id: I38061e31370d3fcd6587a256919c98e4d2c17582
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>