NNAPI SL Benchmark - Add option to specify vendor [2/n]. am: 0d7c9e2853 am: c77a35d9dc am: c93a0f8b25 am: a9c5995d1d

Original change: https://android-review.googlesource.com/c/platform/test/mlts/benchmark/+/2096395

Change-Id: I0838cbcf020a3a63fa7e1e9d929e3b2c00bbad83
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>