Retiring the Google Glass and the ZXing Test app

[Sean Owen]

I'm looking to remove the Google Glass app from the project. The hardware has been discontinued and it was more of a toy app.

I'm also thinking there's no real value in keeping the ZXing Test app around. It was used a long time ago but there's no active need for reports from the app now. It can stay on the store though.

I believe it's worth keeping android-core even if there is only one app left because it helps others make their own Android apps.