updates: Migrate to viewBinding

- Kotlin Android Extensions is deprecated
- It has important advantages over using findViewById

Ref:
- [1]: https://developer.android.com/topic/libraries/view-binding/migration
- [2]: https://developer.android.com/topic/libraries/view-binding#findviewbyid



Signed-off-by: Aayush Gupta <theimpulson@e.email>