Filter out non-Android pings
Filter out non-Android pings

For now we should look only at the Android pings.
iOS started to submit core pings too, so we need to filter.

acmiyaguchi/data-pipeline,mozilla-services/data-pipeline,acmiyaguchi/data-pipeline,acmiyaguchi/data-pipeline,mozilla-services/data-pipeline,mozilla-services/data-pipeline,acmiyaguchi/data-pipeline,mozilla-services/data-pipeline