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
Summary:
public
This is the first module moving to the new model of working with Promises.
We now warn on uses of callback version. At some point we will remove that.
Reviewed By: davidaurelio
Differential Revision: D2849811
fb-gh-sync-id: 8a31924cc2b438efc58f3ad22d5f27c273563472
