NNAPI SL Benchmark - Add option to specify vendor [3/n]. am: 3a8f029f72 am: a695f667e9 am: 499a1d9caf am: 67b8b6a09c

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

Change-Id: Ib6766de15932586be4ac3ac5cf108b0d71019204
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>