Update the services WiFi Listening Interface

[3ygun]

Goal

Make the WiFi handling more robust and fix #24 and #15

Parts

• Use more of the connectivity manager listeners
  • Use the CONNECTIVITY_ACTION
  • Use the isActiveNetworkMetered

Links to ideas

• Network listener Android
• connectivitymanager - android.net.conn.CONNECTIVITY_CHANGE
• wait until wifi connected on android

[3ygun]

Completed by #26. The isActiveNetworkMetered() can be future work