Feature Request: add Ping plugin

[racuna]

Steps to reproduce the behavior: Want to disable sync when the phone is not connected / Enable when the phone is connected.

1. Add connectivity type: "Not Connected"
2. Add script using "Not Connected" condition
3. e.g. Phone is connected to a Wifi, but that Wifi doesn't have Internet connection.
   • In the current Easer behavior, this will not disable sync, because the phone is connected, even when there is no Internet connection.

Proposal:

Add a skill to send a ping every N seconds to a certain IP to check if the phone is really connected.