Add an API for clearing the SkParagraph font and paragraph caches

Change-Id: Id8de439c8d872a6dad56acb5db4153186a9a9d96
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/320397
Reviewed-by: Julia Lavrova <jlavrova@google.com>
Commit-Queue: Jason Simmons <jsimmons@google.com>
2 files changed