Fix issue #8176917: Stabillity : Native Crash :

/system/lib/libandroidfw.so

Change-Id: I235470fac7ad0f5a5d3432006f4dfa69620e30d8
diff --git a/core/jni/android_util_AssetManager.cpp b/core/jni/android_util_AssetManager.cpp
index d422951..8a8b15f 100644
--- a/core/jni/android_util_AssetManager.cpp
+++ b/core/jni/android_util_AssetManager.cpp
@@ -685,6 +685,10 @@
                                                            jobject outValue,
                                                            jboolean resolve)
 {
+    if (outValue == null) {
+         jniThrowNullPointerException(env, "outValue");
+         return null;
+    }
     AssetManager* am = assetManagerForJavaObject(env, clazz);
     if (am == NULL) {
         return 0;