feat #1688: Add UDP mesh toggle (#1689)

Adds a toggle to enable or disable mesh via UDP.

app/src/main/java/com/geeksville/mesh/ui/radioconfig/components/NetworkConfigItemList.kt

@@ -276,6 +276,24 @@ fun NetworkConfigItemList(
                     networkInput = networkInput.copy { ipv4Config = ipv4 }
                 })
         }
+        item { Divider() }
+
+        item {
+            PreferenceCategory(text = stringResource(R.string.udp_config))
+        }
+
+        item {
+            SwitchPreference(
+                title = stringResource(R.string.mesh_via_udp_enabled),
+                checked = networkInput.enabledProtocols == 1,
+                enabled = enabled,
+                onCheckedChange = {
+                    networkInput =
+                        networkInput.copy { if (it) enabledProtocols = 1 else enabledProtocols = 0 }
+                })
+        }
+
+        item { Divider() }
 
         item {
             PreferenceFooter(

app/src/main/res/values/strings.xml

@@ -341,4 +341,6 @@
     <string name="meshtastic_low_battery_notifications">Low battery notifications</string>
     <string name="low_battery_title">Low battery: %s</string>
     <string name="meshtastic_low_battery_temporary_remote_notifications">Low battery notifications (favorite nodes)</string>
+    <string name="mesh_via_udp_enabled">Mesh via UDP enabled</string>
+    <string name="udp_config">UDP Config</string>
 </resources>