Revert of Delete SkImageDecoder (patchset #8 id:130001 of https://codereview.chromium...

Revert of Delete SkImageDecoder (patchset #8 id:130001 of https://codereview.chromium.org/1820503002/ )

Reason for revert:
Testing the roll - it's still failing

Original issue's description:
> Delete SkImageDecoder
>
> This image decoding implementation has been replaced
> by SkCodec in Android.
>
> Additionally, we have replaced uses of SkImageDecoder
> in Skia and Google3 with uses of SkCodec.
>
> Now we can delete SkImageDecoder :).
>
> BUG=skia:
> GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1820503002
> CQ_EXTRA_TRYBOTS=client.skia.compile:Build-Ubuntu-GCC-x86_64-Release-CMake-Trybot,Build-Mac-Clang-x86_64-Release-CMake-Trybot
>
> Committed: https://skia.googlesource.com/skia/+/f799706656f2581c5bf5510d94df3fa17cce1607
>
> Committed: https://skia.googlesource.com/skia/+/5b6e73e0c8282c4d85accbfbcecc6dee84f8a1eb

TBR=scroggo@google.com,djsollen@google.com
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=skia:

Review URL: https://codereview.chromium.org/1828433004