Summary:
It seems that the `requestPermission` and `checkPermission` APIs from PermissionsAndroid have been deprecated in react-native 0.40.0., but they are still used in the description and example.
This commit updates the description and the example to use the new APIs.
Closes https://github.com/facebook/react-native/pull/11722
Differential Revision: D4392031
Pulled By: ericvicenti
fbshipit-source-id: e3ceebb1ef557e05dab40bb883013be4ec80bed6