Allow single channel and float convolve.

Change-Id: If448ea2ae38de2f8b95fc884ea0dbf8222964012
diff --git a/graphics/java/android/renderscript/ScriptIntrinsicConvolve3x3.java b/graphics/java/android/renderscript/ScriptIntrinsicConvolve3x3.java
index c9c54b2..d54b675 100644
--- a/graphics/java/android/renderscript/ScriptIntrinsicConvolve3x3.java
+++ b/graphics/java/android/renderscript/ScriptIntrinsicConvolve3x3.java
@@ -48,7 +48,10 @@
      */
     public static ScriptIntrinsicConvolve3x3 create(RenderScript rs, Element e) {
         float f[] = { 0, 0, 0, 0, 1, 0, 0, 0, 0};
-        if (!e.isCompatible(Element.U8_4(rs))) {
+        if (!e.isCompatible(Element.U8(rs)) &&
+            !e.isCompatible(Element.U8_4(rs)) &&
+            !e.isCompatible(Element.F32(rs)) &&
+            !e.isCompatible(Element.F32_4(rs))) {
             throw new RSIllegalArgumentException("Unsuported element type.");
         }
         int id = rs.nScriptIntrinsicCreate(1, e.getID(rs));