Always use all available models in NN*Test

Fix: 135671716
Test: ./build_and_run_benchmark.sh scoring
Test: ./build_and_run_benchmark.sh inference-stress
Test: ./build_and_run_benchmark.sh model-loading-stress
Merged-In: Ie5eed9f943e9d9429efdc8aab8874611250a5ae7
Change-Id: Ie5eed9f943e9d9429efdc8aab8874611250a5ae7
(cherry picked from commit 0188b0e49b2d333159ee8ed929c95a6f41f5a240)
4 files changed