Add create backend texture with color upload bench.

Change-Id: Id4994cb809d6e19ca511b63dba71b45257eca927
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/287618
Commit-Queue: Greg Daniel <egdaniel@google.com>
Reviewed-by: Robert Phillips <robertphillips@google.com>
2 files changed