[native] Make messageBox render on top of delivery icon
[native] Make messageBox render on top of delivery icon

Summary: The [new message swipe animation](https://www.figma.com/file/L675ETKDnGaSwlpZAw4MIC/Mobile-UX-%2F-UI-Design?node-id=2%3A8) requires `SwipeableMessage` to draw on top of the delivery icon. Since we need to do that within an `absolute`-positioned context, using `zPosition` won't work. The easiest approach is simply to switch the render order by using `row-reverse`.

Test Plan: Make sure nothing looks different. (Also tested in combination with following diffs)

Reviewers: palys-swm, atul

Reviewed By: palys-swm

Subscribers: Adrian, karol-bisztyga

Differential Revision: https://phabricator.ashoat.com/D1799

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