Avoid failing when multiple interface address was found

mobile/src/main/java/be/mygod/vpnhotspot/net/Routing.kt

@@ -11,6 +11,7 @@ import be.mygod.vpnhotspot.room.AppDatabase
 import be.mygod.vpnhotspot.util.RootSession
 import be.mygod.vpnhotspot.util.computeIfAbsentCompat
 import be.mygod.vpnhotspot.widget.SmartSnackbar
+import com.crashlytics.android.Crashlytics
 import kotlinx.coroutines.runBlocking
 import timber.log.Timber
 import java.io.IOException
@@ -91,7 +92,12 @@ class Routing(private val caller: Any, private val downstream: String) : IpNeigh
     }
 
     private val hostAddress = try {
-        NetworkInterface.getByName(downstream)!!.interfaceAddresses!!.asSequence().single { it.address is Inet4Address }
+        val addresses = NetworkInterface.getByName(downstream)!!.interfaceAddresses!!
+                .filter { it.address is Inet4Address }
+        if (addresses.size > 1) {
+            Crashlytics.logException(IllegalArgumentException("More than one addresses was found: $addresses"))
+        }
+        addresses.first()
     } catch (e: Exception) {
         throw InterfaceNotFoundException(e)
     }