Remove delay of 30 minutes before first sync after /e/ account creation. Also add a small fix for nougat

But before I need to test fresh install on Oreo and nougat

Before Fix:

When you add your /e/ account,eDrive's initializer service is run and at its end it schedules a synchro in 31 minutes (with flex time of 5 min). As this is the Scheduled job which start ObserverService and ScreenOffReciever, you can't sync in the first 30 minutes of eDrive.

After fix:

At end of initialization, the screenOffReciever is already registered and the ObserverService is started.

How to test:

Take a photo. Create /e/ account on your phone. wait 2-3 minutes and check if you photo is in the cloud. If yes it is a success.