correctly order ASyncStorage

Reviewed By: sahrens

Differential Revision: D4585569

fbshipit-source-id: e0bebddea8a5810386e193eb6435f24ba3a5cbb0

Libraries/Storage/AsyncStorage.js

@@ -16,8 +16,8 @@
 const NativeModules = require('NativeModules');
 
 // Use RocksDB if available, then SQLite, then file storage.
-const RCTAsyncStorage = NativeModules.AsyncSQLiteDBStorage ||
-  NativeModules.AsyncRocksDBStorage ||
+const RCTAsyncStorage = NativeModules.AsyncRocksDBStorage ||
+  NativeModules.AsyncSQLiteDBStorage ||
   NativeModules.AsyncLocalStorage;
 
 /**