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

src/core/SkBlitter.cpp

Index: src/core/SkBlitter.cpp
diff --git a/src/core/SkBlitter.cpp b/src/core/SkBlitter.cpp
index ce7c4e8ccd70b966825c04fa09e66f0beea347e2..bb5cfb72e3af36efa20663c014f8d1f2e3b14499 100644
--- a/src/core/SkBlitter.cpp
+++ b/src/core/SkBlitter.cpp
@@ -593,7 +593,7 @@ public:
     }
 
     size_t onContextSize(const ContextRec& rec) const override {
-        size_t size = SkAlign16(sizeof(Sk3DShaderContext));
+        size_t size = sizeof(Sk3DShaderContext);
         if (fProxy) {
             size += fProxy->contextSize(rec);
         }