Idea: Opt-in metrics collection for crowd-sourced detection of Play Store API breakage

[dweinstein]

Would anyone object to adding an optional feature that collects and reports back metrics from their gpapi usage.

Specifically I think it would benefit the community of users that currently aren't sure when Google changes the protocol and breaks usage of this API. By crowd sourcing data maybe we would know faster when everyone is having an issue using the API.

See e.g., #84 #83

Your input is welcome before I add something like this. Thanks!