[automerger skipped] Backport NNTestBase.getAcceleratorNames from am: d63f731294 -s ours

am skip reason: Merged-In I8b4133fe9da41e7f69abe1dfa923f04c129711a4 with SHA-1 f8fc693734 is already in history

Original change: https://android-review.googlesource.com/c/platform/test/mlts/benchmark/+/1859118

Change-Id: I9a82ca7b5af36a730ad35b12ff11e6c2fe698bd6