[includes] Fix includes of SkFixed.h

Change-Id: I3f22c44216a92db0ae74da7005c4ab484b8a0992
Bug: skia:13052
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/612316
Reviewed-by: Ben Wagner <bungeman@google.com>
2 files changed