Microsoft Computer Vision API key found in source

[johnbindel]

https://github.com/theCreedo/pick-it-up/blob/dff5d6501583f2d99b116d4df6662636769e631c/app/src/main/java/com/example/ty/pickitup/Vision.java

Since the key is checked into public github, anyone can see/use it. Consider taking the following steps to remedy this:

1. get a new API key
2. retire usage of key
3. do this with config that is not-version controlled- don't check into GitHub