Include the SkTSort header only where it is used.

Change-Id: If51be35205b40c4a22979a4b49b031126af1dde7
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/302500
Commit-Queue: John Stiles <johnstiles@google.com>
Commit-Queue: Mike Klein <mtklein@google.com>
Auto-Submit: John Stiles <johnstiles@google.com>
Reviewed-by: Mike Klein <mtklein@google.com>
12 files changed