vom: support separate vom type stream
This change allows separate vom type stream through a type encoder.
* Tried to use the existing code base as much as possible although
they are moved around for a better structuring.
* Tried to keep value encoder/decoder and type encoder/decoder
independent each other, but it was a little bit difficult in
decoder side since we support both merged and separate type
stream :) We may clean up when we don't need to support a
merged stream any more.
* This is a part of issues/1221.
MultiPart: 2/2
Change-Id: I98242379a3eedd86b54e9014bda1f3f0827f305b
1 file changed
