I'm not sure when this can happen, but it seems it does
at least on older versions of the platform. Let's avoid
crashing.

Bug: 11618402
Change-Id: If730b5bd8f20e0f60b884eab5900099116afc5f0

This also abstracts away the "package deactivated" case for
simpler and safer code.

Bug: 11072561
Change-Id: Idaaf2ae8d8d5b2c4a15de641bbf2f8c5c7cc9410