Calls Blocker

Invalid date

When a incoming call from a unknown number ends a notification is added asking for block this number (if list type is black list)
Removed read/write external storage permission request
App data backups folder is now /sdcard/Android/data/com.ryosoftware.callsblocker/files/backups, to accomplish with new Android directives. Note that this folder will be automatically removed if app was uninstalled
Updated SDK from v28 to v30