Restore mipmap usage in yuv420_odd_dim_repeat.

When switching to use LazyYUVImage for this GM I inadvertantly removed
the mipmapped flag.

Change-Id: I9d9f437d5697872e8d68ad74e0228643f7a45e77
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/836937
Reviewed-by: Michael Ludwig <michaelludwig@google.com>
Commit-Queue: Michael Ludwig <michaelludwig@google.com>
Auto-Submit: Jim Van Verth <jvanverth@google.com>
Commit-Queue: Jim Van Verth <jvanverth@google.com>

gm/yuv420_odd_dim.cpp

@@ -139,7 +139,7 @@ DEF_SIMPLE_GM_CAN_FAIL(yuv420_odd_dim_repeat, canvas, errMsg,
         planes[i]->peekPixels(&pixmaps[i]);
     }
     auto yuvaPixmaps = SkYUVAPixmaps::FromExternalPixmaps(yuvaInfo, pixmaps);
-    auto lazyYUV = sk_gpu_test::LazyYUVImage::Make(yuvaPixmaps);
+    auto lazyYUV = sk_gpu_test::LazyYUVImage::Make(yuvaPixmaps, skgpu::Mipmapped::kYes);
 
 #if defined(SK_GRAPHITE)
     if (recorder) {