Improve runtime for generating visualizations.
- Add multiprocessing.
- Limit number of visualization instances for large models. Change from
unlimited to a default maximum of 10 instances.

Test: ./test/mlts/benchmark/tools/build_and_dump_intermediate.sh -p

Change-Id: Ic31c2afd59b4851dafae2f616c4bb0f04e5246dd
Merged-In: Ic31c2afd59b4851dafae2f616c4bb0f04e5246dd
Bug: 161985971
1 file changed