[devtools] Flipper client connection

[rafbcampos]

Description

The connection between a ReactPlayer instance and a Flipper client was tested during the POC. However, the final version is still pending implementation.

TODO:

1. Uncomment the code at devtools/plugins/desktop/common/src/communication-layer/index.ts (lines 29-64);
2. Add the devtools/plugins/mobile/flipper-desktop-client to a Flipper desktop (docs), and verify if the connection between the inspected Player-UI instance and Flipper;
3. Fix connection errors and verify if the client works as intended (we use the same client as the dev tools panel, so the plugin content should be the same as the browser extension).