RN: Uploading files on iOS 11+

Description

Ability to upload from files on iOS 11 +

Flow from AM: https://invis.io/YJFC6W98KM4#/292498115_IOS_11_Files

QA Test Steps

In RN tap on the + icon at the left of the post text box, it should include an option for `Browse Files` that lets you attach any kind of file.

iOS 11: opens the Files app
Android: opens the OS file browser

Mana

4

Assignee

Elias Nahum

QA Assignee

Lindy Isherwood

Reporter

Eric Sethna

Epic Link

None

Fix versions

Mattermost Team

Apps

Sprint

None

Labels

QA Testing Areas

Attachments
Mobile - RN

GitHub Issue

None

Components

None
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