Revert "Integrate ClassLoaderContext check in OatFileAssistant::GetBestOatFile."

This reverts commit c8fe6517faf91b45683cddff3c15e08e489e12e9.

Reason for revert: Breaks 1002-notify-startup (flaky)

Test: "art/test.py -r --host -t 1002" in a loop
Bug: 176960283
Change-Id: I4f5467efa5a1e09452b28b86b183791e4105b19e
8 files changed