Standarize Vanir nomenclature

Why?  Makes us more professional
Also reduced my OCD burden

Many devices hand android_ or platform which is against AOSP rules
All android_ is pretty much from CM
Platform_ for SOME, NOT ALL repos is AOSP, but it's a waste of space.

Leaving the platform_manifest to avoid sync issues

Change-Id: I1724b3ba92d6cb02f06a542ce81fae0a62728f7e