firstItem not working on Android

Is this a bug report, a feature request, or a question?

bug report

Have you followed the required steps before opening a bug report?

• [x ] I have read the guidelines regarding bug report.
• [ x] I have reviewed the documentation in its entirety, including the dedicated documentations 📚.
• [ x] I have searched for existing issues and made sure that the problem hasn't already been reported.
• [ x] I am using the latest plugin version.
• [ x] I am following the issue template closely in order to produce a useful bug report.

Have you made sure that it wasn't a React Native bug?

yes

Is the bug specific to iOS or Android? Or can it be reproduced on both platforms?

Android

Is the bug reproductible in a production environment (not a debug one)?

yes

Environment

Environment:
React: 16.0.0-beta.5
React native: 0.51
react-native-snap-carousel: 3.3.4

Target Platform:
Android (6.0)
iOS (11)
-->

(Write your answer here.)

Expected Behavior

scroll to item number specified in firstItem

Actual Behavior

does not scroll

Reproducible Demo

1. use firstItem on android.

This might be related to https://stackoverflow.com/questions/33208477/react-native-android-scrollview-scrollto-not-working

I fixed it when using scrollTo in my component in a hacky way by introducing a 200ms delay or so on android.

Start by reproducing the Android 6 case with firstItem, then inspect the carousel's firstItem and scrollTo handling, including the reported Android timing behavior. Done means the carousel initially scrolls to the requested item on Android without a caller-side delay, while existing iOS behavior remains intact.