rename GrTextBlobCache to GrTextBlobRedrawCoordinator

Change-Id: Ib1ea2936f7a9431bc62c04b1931cf6da2c213b36
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/483496
Reviewed-by: Robert Phillips <robertphillips@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: Herb Derby <herb@google.com>
16 files changed