added auto-stop on auto-start

[smitdol]

Hi,

I added a added auto-stop on auto-start, so that I can define a timeout for auto-start.

Can you have a look and pull it if you think it is a valuable extension to RadioDroid?

[smitdol]

motivation: waking up at night, starting radiodroid to listen to some music, the app starts playing automatically when 'auto-start' is enabled. Then I always have to manually configure a 'sleep timer' by hand to stop the app again after some time. This change is to configure an automatic sleep timer ('auto-stop') when the 'auto-start' option is enabled, so that the app will stop playing after configured time.

[segler-alex]

Hi, if you are still interested, could you do another push? i would merge it this time. sorry for reacting so late.

[smitdol]

I think/hope I successfully merged the changes