- rename ServiceDB to ServiceDBCommon,
- create separate ServiceDB for Pure and Bell,
- move Pure-specific functionality
from `ServiceDBCommon` to Pure `ServiceDB`
- Added pass code unlock from MC
- Removed Set USB security status
- Changed isLocked to phoneLocked in request for phone lock status
- Removed remainings of USB security in Settings App
- Reworked USB security model to depend both on
Phone lock state and Pass code being enabled
- Updated test_security.py