Provide some compatibility story for devs in the past

They should be providing themes when resolving certain resources,
but they aren't anyway, so try to provide it free of charge, when
possible. Also, nothing is ever free.

Test: Open app that uses old/bad resource methods
Change-Id: Icd57aadf1202ddffb1dd73ab45119fae7e5d6130
Fixes: 35656110