Set device features on device initialization

Summary:
1. Identify if device supports screenshots/screen recording when it is created.
2. Disable screen recording/screenshot buttons when they are not supported

Reviewed By: passy

Differential Revision: D34611133

fbshipit-source-id: 82ad2d67e4af482d9becf7995187667b5d99bc36

desktop/flipper-plugin/src/plugin/DevicePlugin.tsx

@@ -41,7 +41,7 @@ export interface Device {
   clearLogs(): Promise<void>;
   sendMetroCommand(command: string): Promise<void>;
   navigateToLocation(location: string): Promise<void>;
-  screenshot(): Promise<Uint8Array>;
+  screenshot(): Promise<Uint8Array | undefined>;
 }
 
 export type DevicePluginPredicate = (device: Device) => boolean;