Reland "Move SkSubRun to src/text"

Added changes for public.bzl

This is a reland of commit 4a375fe2138efdb7d8fc5ab2c1acabb71369bcad

Original change's description:
> Move SkSubRun to src/text
>
> Change-Id: I5c1040b8236dc792de20495a3fea3c0be6e31c20
> Reviewed-on: https://skia-review.googlesource.com/c/skia/+/549847
> Reviewed-by: Brian Osman <brianosman@google.com>
> Commit-Queue: Herb Derby <herb@google.com>

Change-Id: I86e342a416a3c97bf972c496b93b37e35cd09c19
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/550496
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: Herb Derby <herb@google.com>
59 files changed