Zero-initialize launch option fields

Bug: 28463187

If left unintialized, these fields will fail checks in
setUpMtlsDiemensions() in rsCpuScript.cpp (if targetAPI >= 23).

Change-Id: I143bfcd052a7b799801bf5fbf2b1bae13ca4a671
diff --git a/v8/renderscript/jni/android_renderscript_RenderScript.cpp b/v8/renderscript/jni/android_renderscript_RenderScript.cpp
index fcb4289..78de8d5 100644
--- a/v8/renderscript/jni/android_renderscript_RenderScript.cpp
+++ b/v8/renderscript/jni/android_renderscript_RenderScript.cpp
@@ -1589,6 +1589,12 @@
     sc.strategy = RS_FOR_EACH_STRATEGY_DONT_CARE;
     sc.arrayStart = 0;
     sc.arrayEnd = 0;
+    sc.array2Start = 0;
+    sc.array2End = 0;
+    sc.array3Start = 0;
+    sc.array3End = 0;
+    sc.array4Start = 0;
+    sc.array4End = 0;
     if (mUseInc) {
         dispatchTab.ContextFinish((RsContext)con);
         dispatchTabInc.ScriptForEach((RsContext)incCon, (RsScript)script, slot,
@@ -1620,6 +1626,12 @@
     sc.strategy = RS_FOR_EACH_STRATEGY_DONT_CARE;
     sc.arrayStart = 0;
     sc.arrayEnd = 0;
+    sc.array2Start = 0;
+    sc.array2End = 0;
+    sc.array3Start = 0;
+    sc.array3End = 0;
+    sc.array4Start = 0;
+    sc.array4End = 0;
     if (mUseInc) {
         dispatchTab.ContextFinish((RsContext)con);
         dispatchTabInc.ScriptForEach((RsContext)incCon, (RsScript)script, slot,