Add support for mixed 32/64 APKs using RenderScript.

Change-Id: I8901a1547d180c9dcef320f86d07a5b82551fb5c
diff --git a/rs/java/android/renderscript/RenderScript.java b/rs/java/android/renderscript/RenderScript.java
index 2222d2c..8cac22d 100644
--- a/rs/java/android/renderscript/RenderScript.java
+++ b/rs/java/android/renderscript/RenderScript.java
@@ -82,6 +82,12 @@
     */
     public static final long CREATE_FLAG_LOW_POWER = 0x0004;
 
+    /*
+     * Detect the bitness of the VM to allow FieldPacker to do the right thing.
+     */
+    static native int rsnSystemGetPointerSize();
+    static int sPointerSize;
+
     static {
         sInitialized = false;
         if (!SystemProperties.getBoolean("config.disable_renderscript", false)) {
@@ -99,6 +105,7 @@
                 System.loadLibrary("rs_jni");
                 _nInit();
                 sInitialized = true;
+                sPointerSize = rsnSystemGetPointerSize();
             } catch (UnsatisfiedLinkError e) {
                 Log.e(LOG_TAG, "Error loading RS jni library: " + e);
                 throw new RSRuntimeException("Error loading RS jni library: " + e);