Fix failure in scoring test caused by timeout

Fix failures "IllegalStateException: Failed to evaluate complete input
set" in scoring tests.
Tests couldn't complete because they were running over the configured
timeout.

Refactored the code to clarify the purpose of the timeout parameter that
was used in parts of the code as a minimum running time.

Test: build_and_run_benchmark.sh scoring
Bug: 159782692
Change-Id: I6c9d48330f599256006b3dda37078df5a8288469
Merged-In: I6c9d48330f599256006b3dda37078df5a8288469
4 files changed