Add missing support for Element.FONT().

Change-Id: Id66676958cc41d934b7f01acd65916f6d777d355
diff --git a/graphics/java/android/renderscript/RenderScript.java b/graphics/java/android/renderscript/RenderScript.java
index 03294b5..abbcdd9 100644
--- a/graphics/java/android/renderscript/RenderScript.java
+++ b/graphics/java/android/renderscript/RenderScript.java
@@ -664,6 +664,7 @@
     Element mElement_PROGRAM_VERTEX;
     Element mElement_PROGRAM_RASTER;
     Element mElement_PROGRAM_STORE;
+    Element mElement_FONT;
 
     Element mElement_A_8;
     Element mElement_RGB_565;