Manually start and stop session recordings

[ioannisj]

Problem Statement

Ticket: https://posthoghelp.zendesk.com/agent/tickets/20809

Add APIs to allow for manual start/stop of session recordings

• [ ] iOS
• [ ] Android
• [ ] React Native

Solution Brainstorm

https://github.com/PostHog/posthog-js/blob/1b57ea9f6b7736f3e3fce0fd512b467ddb35c5d9/src/posthog-core.ts#L1837

[marandaneto]

@ioannisj Android and RN as well, you can add the checklist and associate with the GH projects