after converting to typescript, we switch from an angular service to exported functions

to handle the events, switching to exported functions called when that event is accomplished

was imported to controller, but never used

when I merged my startprefs branch, I forgot to update storedevicesettings to reflect the removal of that angular service

since there is no angular code in this file, can't use $ionicPlatform

instead call the init function from the App code

while testing, there were some new or updated mocks needed, as well as some updates to the file in order to allow the tests to wait for these methods to run before testing for the results

I don't think we need to await the functions as they're used, however, because it's ok if they run asyncronously in context

…rite-storedevicesettings