Bug 900289 - Part 1: Enable foreign key pragma on DB open.
Bug 900289 - Part 2: Update licenses.
Bug 900289 - Part 3: Add PrepopulatedMockHealthReportStorage and insert tests.
Bug 900289 - Part 4: Add foreign key constraint tests (db level).
Bug 900289 - Part 5: Add deleteEverything test.
Bug 900289 - Part 6: Add cascading and restricted deletion tests.
Bug 900289 - Part 7: Add foreign key constraint tests through measurement recording.