Revert "hide SkImageDeserializer"

This reverts commit 834fb8ed906984739aee6b61417afddb9c6e469c.

Reason for revert: broke google3

Original change's description:
> hide SkImageDeserializer
> 
> Bug: skia:
> Change-Id: I1cd4e8c626628a3e6426afd7d6bae628d58989c3
> Reviewed-on: https://skia-review.googlesource.com/85743
> Reviewed-by: Mike Reed <reed@google.com>
> Commit-Queue: Mike Reed <reed@google.com>

TBR=reed@google.com,reed@chromium.org

Change-Id: I00679c8651817af1777785da6c8dac9411a2a7c2
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: skia:
Reviewed-on: https://skia-review.googlesource.com/85880
Reviewed-by: Mike Reed <reed@google.com>
Commit-Queue: Mike Reed <reed@google.com>
6 files changed