[graphite] Set up ContextOptions for text

Bug: skia:13118
Change-Id: I90aee8cff625ad822fa9d62f803a8badbe51925e
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/552676
Commit-Queue: Jim Van Verth <jvanverth@google.com>
Reviewed-by: Greg Daniel <egdaniel@google.com>
11 files changed