Remove use of deprecated folly::dynamic initialization

Reviewed By: ot

Differential Revision: D3021659

fb-gh-sync-id: 1ba5e2fcc5b30ce4b6174fb911608236c1c3084b
shipit-source-id: 1ba5e2fcc5b30ce4b6174fb911608236c1c3084b

ReactAndroid/src/main/jni/react/jni/OnLoad.cpp

@@ -233,7 +233,7 @@ struct WritableNativeArray
   static constexpr const char* kJavaDescriptor = "Lcom/facebook/react/bridge/WritableNativeArray;";
 
   WritableNativeArray()
-      : HybridBase(folly::dynamic({})) {}
+      : HybridBase(folly::dynamic::array) {}
 
   static local_ref<jhybriddata> initHybrid(alias_ref<jclass>) {
     return makeCxxInstance();