Latest version of AIR to support Android 2.2?

On Adobe's website, I can find the info that AIR 3.0 supported Android 2.2, and I can find that AIR 3.7 and 3.8 only support 2.3 and up, but nowhere can I find which version was the last to support Android 2.2; every old version's release notes link to the most recent system requirements.

I need to support an Android 2.2 device which I don't have available for testing, and AIR 3.7 apparently crashes it instantly (NOOK Color.) Does anyone know the most recent version I can safely use on this device? (captive runtime, of course)