Gsoc 2023 contact us fragment migartion to compose

[narendraanjana09]

Fixes #43

Changes :
Migrated fragment_contact_us.xml to ContactUsScreen.kt in Compose

Previous UI:

New UI Screen recording:

https://github.com/AOSSIE-Org/Agora-Android/assets/60137237/9793989c-9f2e-4b2f-b6fb-151d52ce497a

Appetize App Link
https://appetize.io/app/d7wqeezvl3ynuojmq2fgpxgow4?device=pixel4&osVersion=11.0&scale=75

[hackeramitkumar]

LGTM