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/utils/MathUtils.h b/libs/hwui/utils/MathUtils.h
index 62bf39c..1d3f9d7 100644
--- a/libs/hwui/utils/MathUtils.h
+++ b/libs/hwui/utils/MathUtils.h
@@ -22,11 +22,11 @@
 namespace android {
 namespace uirenderer {
 
-#define NON_ZERO_EPSILON (0.001f)
-#define ALPHA_EPSILON (0.001f)
-
 class MathUtils {
 public:
+    static constexpr float NON_ZERO_EPSILON = 0.001f;
+    static constexpr float ALPHA_EPSILON = 0.001f;
+
     /**
      * Check for floats that are close enough to zero.
      */