add(build-420): Add manifest for v420.0.0

Change-Id: I84d7a7f8caea2473249e76da58acad7a478b8177
Merge tag 'v420.0.0' into master

v420.0.0 was generated from an out of date manifests repo.

Change-Id: I7e9195580b171fa068f7705fbad1c83372084ede