https://www.angroid.gr/android-efarmoges/rootpush-notification-fixer-%ce%b2%ce%b5%ce%bb%cf%84%ce%b9%cf%8e%cf%83%cf%84%ce%b5-%cf%84%ce%b7%ce%bd-%cf%84%ce%b1%cf%87%cf%8d%cf%84%ce%b7%cf%84%ce%b1-%cf%84%cf%89%ce%bd-notifications