Adding getters to rs program obejcts.

Change-Id: Iff8ccc1835109d303201d6a1adb6e5cbde8ba634

graphics/java/android/renderscript/Program.java

@@ -76,6 +76,40 @@ public class Program extends BaseObj {
         super(id, rs);
     }
 
+    /**
+     * @hide
+     */
+    public int getConstantCount() {
+        return mConstants != null ? mConstants.length : 0;
+    }
+
+    /**
+     * @hide
+     */
+    public Type getConstant(int slot) {
+        if (slot < 0 || slot >= mConstants.length) {
+            throw new IllegalArgumentException("Slot ID out of range.");
+        }
+        return mConstants[slot];
+    }
+
+    /**
+     * @hide
+     */
+    public int getTextureCount() {
+        return mTextureCount;
+    }
+
+    /**
+     * @hide
+     */
+    public TextureType getTextureType(int slot) {
+        if ((slot < 0) || (slot >= mTextureCount)) {
+            throw new IllegalArgumentException("Slot ID out of range.");
+        }
+        return mTextures[slot];
+    }
+
     /**
      * Binds a constant buffer to be used as uniform inputs to the
      * program