* Detect if the app is running in debug mode or not.
* Debug mode is when the app is built and installed locally via xcode / eclipse / the cordova cli etc, compared to release mode when the app was downloaded from the app / play store via an end user.
* @returns {Promise<boolean>} Returns a promise that resolves with true if the app was installed via xcode / eclipse / the ionic CLI etc. It will resolve to false if the app was downloaded from the app / play store by the end user.