NNAPI SL Benchmark - Add option to specify vendor [3/n]. am: 3a8f029f72 am: a695f667e9 am: 499a1d9caf am: 67b8b6a09c am: 49e1cff736

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

Change-Id: I006fd4238dece57098c36b3211732b3ac1e2c5f0
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>