Start implementing SurfaceTexture streaming into RS allocations.

Change-Id: I561fbb63c63371ea59047c07fb2d68c21d16e76b

graphics/java/android/renderscript/RenderScript.java

@@ -269,6 +269,12 @@ public class RenderScript {
         validate();
         rsnAllocationSyncAll(mContext, alloc, src);
     }
+    native int rsnAllocationGetSurfaceTextureID(int con, int alloc);
+    synchronized int nAllocationGetSurfaceTextureID(int alloc) {
+        validate();
+        return rsnAllocationGetSurfaceTextureID(mContext, alloc);
+    }
+
     native void rsnAllocationGenerateMipmaps(int con, int alloc);
     synchronized void nAllocationGenerateMipmaps(int alloc) {
         validate();