Update package names to work with the proto3 compiler

Bug: b/28974522
Change-Id: I5f3adf4946ee4ba1e09e4f40afe83c151405972a
diff --git a/tools/aapt2/compile/Png.cpp b/tools/aapt2/compile/Png.cpp
index f1bc53e..7ab05b5 100644
--- a/tools/aapt2/compile/Png.cpp
+++ b/tools/aapt2/compile/Png.cpp
@@ -232,6 +232,13 @@
     }
 }*/
 
+#ifdef MAX
+#undef MAX
+#endif
+#ifdef ABS
+#undef ABS
+#endif
+
 #define MAX(a, b) ((a) > (b) ? (a) : (b))
 #define ABS(a) ((a) < 0 ? -(a) : (a))