Revert "Remove unused code for patching oat files."

oat_file_assistant_test fails on target.

Bug: 33192586

This reverts commit c9f76628ce1dc54f852b689ed1722b7e154b2a9d.

Change-Id: Ie3b8900ed16d0f4033a76c7eb60ac8e9ad13f089
4 files changed