LanDroid - network tools

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* New tool: UPnP Discover (Beta)

* Android 10 (API 29) compatibility

Android 10 (API level 29) introduced many privacy changes and restrictions.
Therefore the "NetStat" tool is not supported from Android 10 onwards.
Also the interface counters and sockets information (on LocalNet) are not available anymore.
A workaround has been implemented to diplay the network routes.

* The app now requires "Location" permission to display the SSID/BSSID information on LocalNet properly.