Save appstore who was used for IAB and always use it later

[Vassili Philippov]

There are complex scenarios when application was installed from one store but updated from another appstore. Which appstore to use for IAB in that case?

What we need to do is to make sure that once one appstore was used for IAB it will be continue used for other IAB. So the OpenIAB library should safe appstore ID in local storage after first usage and always use this appstore later.

Also added it as an issue at GitHub:

https://github.com/onepf/OpenIAB/issues/10

Best regards,

Vassili