Summary:
Pull Request resolved: https://github.com/facebook/react-native/pull/45577
# Changelog: [Internal]
This diff adds new native module, which can be used from JavaScript.
The API includes:
1. `hasActiveSession`: returns a boolean flag, which can be used for determining if 1 or more debugging sessions are active for current HostTarget.
2. `subscribe`: receives a callback, which will be executed once the debugging state changes. To be more precise, this will only be called when state is changing from no active sessions to 1 session or the other way around. Callback should expect to receive one boolean argument, which can be used for determining if there is an active session.
Reviewed By: huntie
Differential Revision: D59975264
fbshipit-source-id: dd095954529f573f38e9fae1792465a59e639d23