Adds support for multi-input kernels to Frameworks/RS.

This patch modifies Frameworks/RS in the following ways:
* Adjusted the data-layout of the C/C++ version of RsForEachStubParamStruct to
  accommodate a pointer to an array of input allocations and a pointer to an
  array of stride sizes for each of these allocatoins.
* Adds a new code path for Java code to pass multiple allocations to a RS
  kernel.
* Packs base pointers and step values for multi-input kernels into the new
  RsForEachStubParamStruct members.

Change-Id: I46d2834c37075b2a2407fd8b010546818a4540d1

rsScriptIntrinsic.cpp

diff --git a/rsScriptIntrinsic.cpp b/rsScriptIntrinsic.cpp
index ab439e6..86f1c50 100644
--- a/rsScriptIntrinsic.cpp
+++ b/rsScriptIntrinsic.cpp
@@ -67,6 +67,18 @@
     rsc->mHal.funcs.script.invokeForEach(rsc, this, slot, ain, aout, usr, usrBytes, sc);
 }
 
+void ScriptIntrinsic::runForEach(Context* rsc,
+                         uint32_t slot,
+                         const Allocation** ains,
+                         size_t inLen,
+                         Allocation* aout,
+                         const void* usr,
+                         size_t usrBytes,
+                         const RsScriptCall* sc) {
+
+    rsc->mHal.funcs.script.invokeForEachMulti(rsc, this, slot, ains, inLen, aout, usr, usrBytes, sc);
+}
+
 void ScriptIntrinsic::Invoke(Context *rsc, uint32_t slot, const void *data, size_t len) {
 }