Revert "move encoders into codec_srcs"

This reverts commit 6a896113532148bdba12adf39a6a5ba1fe5ab582.

Reason for revert: <INSERT REASONING HERE>

Original change's description:
> move encoders into codec_srcs
> 
> This is a stepping stone towards runtime registration.
> 
> This should work in concert with all the other CLs
> that are in the roll pipeline to get things building.
> 
> Change-Id: Id95f1e0bbea2f48f7b5fa438f4310f8db1d5b978
> Reviewed-on: https://skia-review.googlesource.com/c/skia/+/214083
> Auto-Submit: Mike Klein <mtklein@google.com>
> Reviewed-by: Mike Klein <mtklein@google.com>
> Commit-Queue: Mike Klein <mtklein@google.com>

TBR=mtklein@google.com,scroggo@google.com,brianosman@google.com

Change-Id: I4808404f0968e8a4deaf259a46e366152b7590fc
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/214100
Reviewed-by: Mike Klein <mtklein@google.com>
Commit-Queue: Mike Klein <mtklein@google.com>
1 file changed