Make sure devices and clients are registered on session startup

Summary: This diff makes sure that when the client starts, it fetches all known devices and clients first, as it might have missed the 'connect' events for those. For Electron this wasn't needed, since the server starts with the UI, but this makes sure that a browser reload or a second connection sees the same devices & apps

Reviewed By: aigoncharov

Differential Revision: D32881589

fbshipit-source-id: 7b1cb3d296044f83dedcf3f3d8d02864690b6666

desktop/flipper-server-core/src/FlipperServerImpl.tsx

@@ -214,6 +214,9 @@ export class FlipperServerImpl implements FlipperServer {
   private commandHandler: FlipperServerCommands = {
     'get-config': async () => this.config,
     'get-changelog': getChangelog,
+    'device-list': async () => {
+      return Array.from(this.devices.values()).map((d) => d.info);
+    },
     'device-start-logging': async (serial: string) =>
       this.getDevice(serial).startLogging(),
     'device-stop-logging': async (serial: string) =>
@@ -242,6 +245,9 @@ export class FlipperServerImpl implements FlipperServer {
       }
       device.sendCommand(command);
     },
+    'client-list': async () => {
+      return Array.from(this.server.connections.values()).map((c) => c.client);
+    },
     'client-request': async (clientId, payload) => {
       this.server.connections.get(clientId)?.connection?.send(payload);
     },