Run GrTextureMipMapInvalidationTest on rendering contexts

The logic being tested is implemented in the various Gr*Gpu classes, so
running it on the NullGL context seems like an oversight.

Bug: skia:
Change-Id: I629010f0abde9347f06602a6b8774df7a19a3da7
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/203704
Commit-Queue: Brian Osman <brianosman@google.com>
Reviewed-by: Robert Phillips <robertphillips@google.com>
1 file changed