feat: add tls_enabled config

app/src/main/java/com/geeksville/mesh/ui/ModuleSettingsItemList.kt

@@ -121,6 +121,14 @@ fun ModuleSettingsItemList(viewModel: UIViewModel = viewModel()) {
         }
         item { Divider() }
 
+        item {
+            SwitchPreference(title = "TLS enabled",
+                checked = mqttInput.tlsEnabled,
+                enabled = connected,
+                onCheckedChange = { mqttInput = mqttInput.copy { tlsEnabled = it } })
+        }
+        item { Divider() }
+
         item {
             PreferenceFooter(
                 enabled = mqttInput != moduleConfig.mqtt,