Fix #includes in SkiaInterpolator

Needed for https://skia-review.googlesource.com/c/skia/+/610776

Change-Id: If3750ccd1504d32e710690855699de3688b5766a
diff --git a/libs/hwui/SkiaInterpolator.cpp b/libs/hwui/SkiaInterpolator.cpp
index 0695dd1..153c3b6 100644
--- a/libs/hwui/SkiaInterpolator.cpp
+++ b/libs/hwui/SkiaInterpolator.cpp
@@ -17,6 +17,8 @@
 #include "SkiaInterpolator.h"
 
 #include "include/core/SkMath.h"
+#include "include/core/SkScalar.h"
+#include "include/core/SkTypes.h"
 #include "include/private/SkFixed.h"
 #include "include/private/SkMalloc.h"
 #include "include/private/SkTo.h"