[next][android] fix gap

[troZee]

          ![Screenshot_1693505469](https://github.com/callstack/react-native-pager-view/assets/12766071/2f8e894b-ffb6-4680-89ba-906e263fca46)

Spacing issue

Originally posted by @troZee in #763 (comment)

[MrRefactor]

Closing as we are moving away from next experimental implementation.