Describes when the lock screen should be shown.
The lock screen should never be shown. This should almost always mean that you will build your own lock screen.
case never = 0
The lock screen should only be shown when it is required by the head unit.
case requiredOnly = 1
The lock screen should be shown when required by the head unit or when the head unit says that its optional, but not in other cases, such as before the user has interacted with your app on the head unit.
case optionalOrRequired = 2
The lock screen should always be shown after connection.
case always = 3