Fix shift of the blue component in store_1010102_xr

Bug: https://github.com/flutter/flutter/issues/168849
Change-Id: I43c21535fbea6749f644301e162aacb2bbd5f5c3
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/994956
Reviewed-by: Michael Ludwig <michaelludwig@google.com>
Commit-Queue: Jason Simmons <jsimmons@google.com>
(cherry picked from commit bb255dd0252e256a28542475b22711346c319030)
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/999136
Reviewed-by: Heather Miller <hcm@google.com>

diff --git a/src/opts/SkRasterPipeline_opts.h b/src/opts/SkRasterPipeline_opts.h
index 9573b84..c24fc2e 100644
--- a/src/opts/SkRasterPipeline_opts.h
+++ b/src/opts/SkRasterPipeline_opts.h

@@ -3099,7 +3099,7 @@
     // This is the inverse of from_1010102_xr, e.g. (v * 510 + 384)
     U32 px = to_unorm(r, /*scale=*/510, /*bias=*/384, /*maxI=*/1023)
            | to_unorm(g, /*scale=*/510, /*bias=*/384, /*maxI=*/1023) << 10
-           | to_unorm(b, /*scale=*/510, /*bias=*/384, /*maxI=*/1023) << 10
+           | to_unorm(b, /*scale=*/510, /*bias=*/384, /*maxI=*/1023) << 20
            | to_unorm(a, /*scale=*/3) << 30;
     store(ptr, px);
 }