Renames AssetUtils to IOUtils and moves readFloats() there.

readFloats() logic was duplicated in MelCepLogF0 and TopK evaluators.

Bug: 113651411

Test: Covered by existing test:
com.example.android.nn.benchmark.NNTest

Change-Id: If5445319ae349af676392830109857f035728a0f
Merged-In: If5445319ae349af676392830109857f035728a0f
(cherry picked from commit bee83fac65c0348d9d8b2023d5e991c146b6ddd5)
5 files changed