[skottie] Fix color parsing

Currently truncating unnecessarily.

TBR=
Change-Id: I1929a4de62364e4685eb67f9a79b01a8dbac1c61
Reviewed-on: https://skia-review.googlesource.com/133823
Reviewed-by: Florin Malita <fmalita@chromium.org>
Commit-Queue: Florin Malita <fmalita@chromium.org>
1 file changed