Kyle Corbitt 57af9ecbe0 Allow CameraRoll to export videos
Summary:
This PR adds the ability to export videos to the CameraRoll on both Android and iOS (previously only photos were possible, at least on iOS). The API has changed as follows:

```
// old
saveImageWithTag(tag: string): Promise<string>

// new
saveToCameraRoll(tag: string, type?: 'photo' | 'video'): Promise<string>
```

if no `type` parameter is passed, `video` is inferred if the tag ends with ".mov" or ".mp4", otherwise `photo` is assumed.

I've left in the `saveImageWithTag` method for now with a deprecation warning.

**Test plan (required)**

I created the following very simple app to test exporting photos and videos to the CameraRoll, and ran it on both iOS and Android. The functionality works as intended on both platforms.

```js
// index.js

/**
 * Sample React Native App
 * https://github.com/facebook/react-native
 * flow
 */

import React, { Component } from 'react';
import {
  AppRegistry,
  StyleSheet,
  Text,
  View,
  CameraRoll,
} from 'react-native';
import FS fro
Closes https://github.com/facebook/react-native/pull/7988

Differential Revision: D3401251

Pulled By: nicklockwood

fbshipit-source-id: af3fc24e6fa5b84ac377e9173f3709c6f9795f20
2016-06-07 16:43:42 -07:00
Description
CameraRoll is a react-native native module that provides access to the local camera roll or photo library.
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