Bintray repositary shutdown

[spilipenko]

Hi,

The Bintray service is not working any more: https://jfrog.com/blog/into-the-sunset-bintray-jcenter-gocenter-and-chartcenter/
but it is used in the Demo code: UXSDKDemo/app/build.gradle line 5
maven { url 'https://mapbox.bintray.com/mapbox' }

This causes a build error:
Could not HEAD 'https://mapbox.bintray.com/mapbox/com/dji/dji-sdk/4.15/dji-sdk-4.15.pom'. Received status code 403 from server: Forbidden

[DJI-William]

We need to find another way to import the mapbox library then. We will look at the UXSDKDemo later.