Batch ops together in SkAtasTextTarget

Change-Id: I7f2b03dd965079f801d66b670bdeb1d01bbf0fd6
Reviewed-on: https://skia-review.googlesource.com/76160
Reviewed-by: Jim Van Verth <jvanverth@google.com>
Commit-Queue: Brian Salomon <bsalomon@google.com>
2 files changed