Adding anisotropic filtering and related samples.

Change-Id: Idb173274417feb5e25bfd64c5e9fa2492a23a17e

graphics/java/android/renderscript/RenderScript.java

@@ -388,6 +388,10 @@ public class RenderScript {
     synchronized void nSamplerSet(int param, int value) {
         rsnSamplerSet(mContext, param, value);
     }
+    native void rsnSamplerSet2(int con, int param, float value);
+    synchronized void nSamplerSet2(int param, float value) {
+        rsnSamplerSet2(mContext, param, value);
+    }
     native int  rsnSamplerCreate(int con);
     synchronized int nSamplerCreate() {
         return rsnSamplerCreate(mContext);