remove align16 calls in skhader context sizes. will handle this elsewhere as needed

src/core/SkPictureShader.cpp

Index: src/core/SkPictureShader.cpp
diff --git a/src/core/SkPictureShader.cpp b/src/core/SkPictureShader.cpp
index 630b1bf8e14c49227a731a38fafba767fb3e876a..3919471b1bd43178f571fb5adb4a5391abb0d9d0 100644
--- a/src/core/SkPictureShader.cpp
+++ b/src/core/SkPictureShader.cpp
@@ -242,7 +242,7 @@ SkShader* SkPictureShader::refBitmapShader(const SkMatrix& viewMatrix, const SkM
 }
 
 size_t SkPictureShader::onContextSize(const ContextRec&) const {
-    return SkAlign16(sizeof(PictureShaderContext));
+    return sizeof(PictureShaderContext);
 }
 
 SkShader::Context* SkPictureShader::onCreateContext(const ContextRec& rec, void* storage) const {