Automatically re-connection sync #64

Great work on the current Android app - works better than expected

What happened:

• after editing notes offline
• then my phone goes back online (wifi reconnections)
• i had to manually refresh and/or select OK on the StandardNotes offline message

What I expect to happen:

• after editing notes offline
• then my phone goes back online (wifi reconnections)
• i expect that Standardnotes auto detects the change and auto syncs my data