Detect Physical iOS device without Xcode

Summary:
This diff adds the support of detecting physical device in Flipper even if the xcode is not installed and there is no cli tool installed.

See the demo.

Reviewed By: timur-valiev

Differential Revision: D26816588

fbshipit-source-id: 5f052998fcbe5c51385222d16df0e1855177b552

desktop/app/src/devices/IOSDevice.tsx

@@ -92,8 +92,10 @@ export default class IOSDevice extends BaseDevice {
       console.warn('Attaching iOS log listener continuously failed.');
       return;
     }
-    if (!this.log) {
-      this.log = iOSBridge.startLogListener(this.serial);
+
+    const logListener = iOSBridge.startLogListener;
+    if (!this.log && logListener) {
+      this.log = logListener(this.serial);
       this.log.on('error', (err: Error) => {
         console.error('iOS log tailer error', err);
       });