Revert "Revert "Ensure dex file are extracted and verified at load time""

Revert "Revert "Ensure dex file are extracted and verified at load time""

The issue was caused by running device-gtests as root (which will always
have full write access everywhere).

For now, disable the tests that rely on file permissions when running as
root.

Test: m test-art-target-gtest-oat_file_assistant_test
Bug: 36605597
Bug: 36824842

This reverts commit 9bfc6bb1f44797aec19a151e47c0902ef2516095.

(cherry picked from commit 357c66dcc20ce15108ecf05f5ecf69a80b383dab)

Change-Id: I73820b8ff9d78af8d9bcb232c8345a07c5788539