Calls (screen off) not logged properly

[ErikBjare]

It seems to not log calls if your display is off (speakerphone worked).

[nicolae-stroncea]

Had the same issue for a 7 minute call where AW reported it as 20 seconds. The other alternatives all correctly reported the same amount.

Probably has something to do with the events that the UsageStatsManager sends for a phone app. Easiest way to fix might be to get some logs of a call and see which events get fired for it.

Maybe #40 fixes it, but I would be surprised if it does.