Mobile (#735)

Initial modification to support mobile client

Export necessary interfaces for Android framework

iface/iface_android.go

@@ -0,0 +1,22 @@
+package iface
+
+import "sync"
+
+// NewWGIFace Creates a new Wireguard interface instance
+func NewWGIFace(ifaceName string, address string, mtu int, tunAdapter TunAdapter) (*WGIface, error) {
+	wgIface := &WGIface{
+		mu: sync.Mutex{},
+	}
+
+	wgAddress, err := parseWGAddress(address)
+	if err != nil {
+		return wgIface, err
+	}
+
+	tun := newTunDevice(wgAddress, mtu, tunAdapter)
+	wgIface.tun = tun
+
+	wgIface.configurer = newWGConfigurer(tun)
+
+	return wgIface, nil
+}