In pictures, how to enable USB ADB on a Sony Smartwatch. Quite straightforward steps and very similar to how you will enable same on other Android Wear or mobile phone devices.

Just a nagging issue sometimes experienced in Android studio, when you can seem to build the app and all seems okay but build fails on "Configure Build" right after "Configure Settings". Restarting the IDE didn't fix it for me. Here was what fixed it in my case.