Cryptohome P0 Checklist Fix

Author(s): kerrnel@chromium.org

• Always include a unit test that exposes the problem before the fix.
• Carefully evaluate the merge to release and beta branches.
• If merging to stable, notify the test team of the fix, and what user paths it could impact.
• The engineer developing/merging the fix should perform manual testing of the functionality affected by the change on a production build that has the merged fix.
• Always run tast run hwsec.* ${TEST_DEVICE_IP} before submission.
• File a tracking bug to write an integration test after the immediate fix and unit test land.