Use stack allocation for Android data in SkScalerContext::MakeRec().

src/core/SkPaint.cpp

Index: src/core/SkPaint.cpp
diff --git a/src/core/SkPaint.cpp b/src/core/SkPaint.cpp
index 4c4d2489a20a36fa19c479bb8c104ee05b34afb5..62db71445ee160c6917ff8f6cd103c21f47a845e 100644
--- a/src/core/SkPaint.cpp
+++ b/src/core/SkPaint.cpp
@@ -1850,7 +1850,8 @@ void SkPaint::descriptorProc(const SkDeviceProperties* deviceProperties,
     }
 
 #ifdef SK_BUILD_FOR_ANDROID
-    SkWriteBuffer androidBuffer;
+    char buffer[128];
+    SkWriteBuffer androidBuffer(buffer, sizeof(buffer));
     fPaintOptionsAndroid.flatten(androidBuffer);
     descSize += androidBuffer.bytesWritten();
     entryCount += 1;