No way to create an instance of `Characteristic.Properties`, prevents faking `DiscoveredCharacteristic` for tests

[curioustechizen]

Consider this definition

public interface DiscoveredCharacteristic : Characteristic {
    public val descriptors: List<DiscoveredDescriptor>
    public val properties: Properties
}

• Properties is a public value class with an internal constructor
• All values of properties are marked internal(Broadcast, WriteWithoutResponse etc).

The result of this is that there is no way for me to create a fake for testing.

object FakeDiscoveredCharacteristic: DiscoveredCharacteristic {
    override val properties: Characteristic.Properties
        get() = Properties(4) // Cannot use this or WriteWithoutResponse
}

Would you consider offering some way to create an instance of Properties to unlock fakes? Or alternatively, do you have any suggestions for how to write unit tests for code that uses DiscoveredCharacteristic?

[twyatt]

The Properties API isn't very friendly, so I'll likely want to change it in the future, hence I'll make the constructor public but mark it as experimental (#1112).