Allow setting an SkColorSpace on SkAnimatedImage

Add a new constructor which merges the SkISize scaledSize with the
SkImageInfo. This allows passing an SkColorSpace to the decode.

Update the test to call the new API.

Bug: b/123301872
Change-Id: I9fd89198e97ac9b8e6dc9fcfe89ed38913a0fe69
Reviewed-on: https://skia-review.googlesource.com/c/189303
Reviewed-by: Derek Sollenberger <djsollen@google.com>
Commit-Queue: Leon Scroggins <scroggo@google.com>
3 files changed