callback for handling meeting leave

[stanwolverine]

Description

This PR adds onMeetingLeave prop to HMSPrebuilt component. Users can pass a callback to HMSPrebuilt component using onMeetingLeave prop, and then the callback will be called when the meeting is ended or user is removed from the room.

User can use this callback to navigate app user to some screen on end of meeting.

const handleMeetingLeave = () => {
    navigation.navigate('<some screen>');
}

...

<HMSPrebuilt
    roomCode={"abc-defg-hij"}
    onMeetingLeave={handleMeetingLeave}
/>

Before:

https://github.com/100mslive/100ms-react-native/assets/45194090/a722b38a-e150-471f-a972-d0e4f320950d

After:

https://github.com/100mslive/100ms-react-native/assets/45194090/8f310ada-a293-40fe-b278-b1a75b575903

Pre-launch Checklist

• [x] The Documentation is updated accordingly, or this PR doesn't require it.
• [x] I updated/added relevant documentation (doc comments with ///).
• [x] I listed at least one issue that this PR fixes in the description above.
• [x] I added new tests to check the change I am making, or this PR is test-exempt.
• [x] All existing and new tests are passing.