[x] Now accepts '00' and '+' as country code prefix. Still requires country code! (issue #10)
[x] Updated list of background autostart restrictions on custom ROMS, checks if app exists to avoid faulty settings open on non-stock ROMs (eex. LineageOS) (see #14)
[x] Added sms sent feedback
Bugfixes:
[x] Refresh log list on new log entry (do not wait for tab reload)
[x] Do not keep on repeating 'no GPS provider network found errors' - manifests on LineageOS
[x] If received SMS does not include country code, SMS response fails (issue #15)
[x] Removed check if it is a mobile number due to too many false negatives (issue #10). added sms sent feedback as backup   