Remove two macros

This is colliding with ag/13519705 and causing
build issues. So replace the macros with constexpr's which are
better

Bug: 179047472
Test: make
Change-Id: Icf7c38077ef608ec97e737d47d3d6c25246190bf
diff --git a/libs/hwui/pipeline/skia/LayerDrawable.cpp b/libs/hwui/pipeline/skia/LayerDrawable.cpp
index 34df5dd..471a7f7 100644
--- a/libs/hwui/pipeline/skia/LayerDrawable.cpp
+++ b/libs/hwui/pipeline/skia/LayerDrawable.cpp
@@ -34,7 +34,7 @@
 }
 
 static inline SkScalar isIntegerAligned(SkScalar x) {
-    return fabsf(roundf(x) - x) <= NON_ZERO_EPSILON;
+    return MathUtils::isZero(roundf(x) - x);
 }
 
 // Disable filtering when there is no scaling in screen coordinates and the corners have the same
diff --git a/libs/hwui/pipeline/skia/ReorderBarrierDrawables.cpp b/libs/hwui/pipeline/skia/ReorderBarrierDrawables.cpp
index 3b8caeb..7cfccb5 100644
--- a/libs/hwui/pipeline/skia/ReorderBarrierDrawables.cpp
+++ b/libs/hwui/pipeline/skia/ReorderBarrierDrawables.cpp
@@ -52,7 +52,7 @@
         RenderNodeDrawable* childNode = mChildren[drawIndex];
         SkASSERT(childNode);
         const float casterZ = childNode->getNodeProperties().getZ();
-        if (casterZ >= -NON_ZERO_EPSILON) {  // draw only children with negative Z
+        if (casterZ >= -MathUtils::NON_ZERO_EPSILON) {  // draw only children with negative Z
             return;
         }
         SkAutoCanvasRestore acr(canvas, true);
@@ -86,7 +86,7 @@
 
     const size_t endIndex = zChildren.size();
     while (drawIndex < endIndex  // draw only children with positive Z
-           && zChildren[drawIndex]->getNodeProperties().getZ() <= NON_ZERO_EPSILON)
+           && zChildren[drawIndex]->getNodeProperties().getZ() <= MathUtils::NON_ZERO_EPSILON)
         drawIndex++;
     size_t shadowIndex = drawIndex;