Allow local contact import to work on Cyanogen.

[patcon]

Fixes #85

AOSP uses a null ACCOUNT_TYPE for local contacts, whereas it seems CM
uses com.android.localphone.

I don't have an android dev environment set up on my current workstation, so this is untested :(

[patcon]

Had to disable to nonplay build flavor (#94).

OK, guess that seemed too easy -- the correct contact count shows up on the import screen, but the the service doesn't actually seem to import anything. Guessing the null accounttype assumption is elsewhere :) I'll try digging a big more later

[patcon]

OK, reading through, wondering whether you would have any objection to treating CM's approach as the "right" one, and treating AOSP's "assume null is local" approach as the thing we work around? I feel like that might read a bit more sensibly