Revert "Use OatFileAssistant default filter instead of the dex2oat one"

The change broke --no-prebuild tests.

Test: testrunner.py --host --no-prebuild
Bug: 38442248

This reverts commit f62422ed7a0a0e0ec70c520192efb79e8360340b.

Change-Id: I820226ca448375e36059e6f8f5540ba5d831261f
4 files changed