Add matrix component types.
Fix potental overflow in script -> java messages.

Change-Id: Ie6fd9dc376be4043fc938a1517106936937689c8
diff --git a/graphics/java/android/renderscript/FieldPacker.java b/graphics/java/android/renderscript/FieldPacker.java
index 24f0409..b6f88be 100644
--- a/graphics/java/android/renderscript/FieldPacker.java
+++ b/graphics/java/android/renderscript/FieldPacker.java
@@ -248,6 +248,24 @@
         addU32(v.w);
     }
 
+    public void addObj(Matrix4f v) {
+        for (int i=0; i < v.mMat.length; i++) {
+            addF32(v.mMat[i]);
+        }
+    }
+
+    public void addObj(Matrix3f v) {
+        for (int i=0; i < v.mMat.length; i++) {
+            addF32(v.mMat[i]);
+        }
+    }
+
+    public void addObj(Matrix2f v) {
+        for (int i=0; i < v.mMat.length; i++) {
+            addF32(v.mMat[i]);
+        }
+    }
+
     public void addBoolean(boolean v) {
         addI8((byte)(v ? 1 : 0));
     }