image_from_yuv_textures GM recreates YUVA image before each draw.

Otherwise if any draw flattens the image all subsequent draws of
the image use the flattened texture.

Change-Id: Id1aa58e33f2ec5a13cf1ff75d15f6137aafd556e

Bug: skia:9570
Change-Id: I3a45c4e2b9fead3a5a2500bf5f738ab5d1fbfc17
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/281336
Commit-Queue: Brian Salomon <bsalomon@google.com>
Commit-Queue: Michael Ludwig <michaelludwig@google.com>
Auto-Submit: Brian Salomon <bsalomon@google.com>
Reviewed-by: Michael Ludwig <michaelludwig@google.com>
1 file changed