Migrated modules/rtc/MockClasses

[naman9271]

fixes #2637

Key Changes

• Add Getters and Setters: Implement getters and setters for the properties in the MockPeerConnection and MockRTC classes.
• Update createPeerConnection Method: Ensure it accepts parameters for id, usesUnifiedPlan, and simulcast.

[naman9271]

@saghul, could you please review this? It introduces some breaking changes, so I’d appreciate it if you could verify that everything is working correctly and nothing is inadvertently broken.

[jitsi-jenkins]

Hi, thanks for your contribution!
If you haven't already done so, could you please make sure you sign our CLA (https://jitsi.org/icla for individuals and https://jitsi.org/ccla for corporations)? We would unfortunately be unable to merge your patch unless we have that piece :(.

[manzil-infinity180]

this return type is a number, but you are returning an object

[naman9271]

the previous implementation of getSettings() already returned an object, and my TypeScript migration keeps the same structure with proper typing. and for this i also create getter getHeight() as it is also returning the same thing as a number