AArch64: Use long for pointers in RS Java/JNI code

Changes include
[x] Some JNI functions, with return type jlong, casts
    pointer to jint before returning it. This has been fixed.

[x] Minor JNI function prototype changes where
    formal paramter type has been changed to a JNI
    type (int to jint for example).

[x] long is used for ScriptC, Sampler, Font, ProgramStore
    handles as they can be 64-bit.

[x] A new hidden constructor ScriptC(long, RenderScript)
    has been added. This should eventually replace public
    API method ScriptC(int, RenderScript).

[x] Font and FileA3D use getNativeAsset instead of getAssetInt
    to get Asset Handles. The getAssetInt method will be
    deprecated in favor of getNativeAsset, as the former does
    not support 64-bit.

[x] rsnPathCreate method accepts loop as an int. This should
    be long as the underlying RS function assumes this to be
    a pointer.

Change-Id: I919d857e5933febe63966049da83de9f9adee6f5
Signed-off-by: Ashok Bhat <ashok.bhat@arm.com>
diff --git a/rs/java/android/renderscript/Font.java b/rs/java/android/renderscript/Font.java
index 0375d2b..cfd11c0 100644
--- a/rs/java/android/renderscript/Font.java
+++ b/rs/java/android/renderscript/Font.java
@@ -151,7 +151,7 @@
         return "DroidSans.ttf";
     }
 
-    Font(int id, RenderScript rs) {
+    Font(long id, RenderScript rs) {
         super(id, rs);
     }
 
@@ -162,7 +162,7 @@
     static public Font createFromFile(RenderScript rs, Resources res, String path, float pointSize) {
         rs.validate();
         int dpi = res.getDisplayMetrics().densityDpi;
-        int fontId = rs.nFontCreateFromFile(path, pointSize, dpi);
+        long fontId = rs.nFontCreateFromFile(path, pointSize, dpi);
 
         if(fontId == 0) {
             throw new RSRuntimeException("Unable to create font from file " + path);
@@ -187,7 +187,7 @@
         AssetManager mgr = res.getAssets();
         int dpi = res.getDisplayMetrics().densityDpi;
 
-        int fontId = rs.nFontCreateFromAsset(mgr, path, pointSize, dpi);
+        long fontId = rs.nFontCreateFromAsset(mgr, path, pointSize, dpi);
         if(fontId == 0) {
             throw new RSRuntimeException("Unable to create font from asset " + path);
         }
@@ -211,9 +211,9 @@
 
         int dpi = res.getDisplayMetrics().densityDpi;
 
-        int fontId = 0;
+        long fontId = 0;
         if (is instanceof AssetManager.AssetInputStream) {
-            int asset = ((AssetManager.AssetInputStream) is).getAssetInt();
+            long asset = ((AssetManager.AssetInputStream) is).getNativeAsset();
             fontId = rs.nFontCreateFromAssetStream(name, pointSize, dpi, asset);
         } else {
             throw new RSRuntimeException("Unsupported asset stream created");