Move more utils into paintutils

Change-Id: I1eb3fd52386bc61a592da235533e40b509eeec24
diff --git a/libs/hwui/RenderProperties.cpp b/libs/hwui/RenderProperties.cpp
index ad74bff..ce1bd6a 100644
--- a/libs/hwui/RenderProperties.cpp
+++ b/libs/hwui/RenderProperties.cpp
@@ -52,11 +52,8 @@
 
 bool LayerProperties::setFromPaint(const SkPaint* paint) {
     bool changed = false;
-    SkXfermode::Mode mode;
-    int alpha;
-    OpenGLRenderer::getAlphaAndModeDirect(paint, &alpha, &mode);
-    changed |= setAlpha(static_cast<uint8_t>(alpha));
-    changed |= setXferMode(mode);
+    changed |= setAlpha(static_cast<uint8_t>(PaintUtils::getAlphaDirect(paint)));
+    changed |= setXferMode(PaintUtils::getXfermodeDirect(paint));
     changed |= setColorFilter(paint ? paint->getColorFilter() : nullptr);
     return changed;
 }