[native] introduce NotificationDescription

Summary:
This diff introduces a small component called NotificationDescription that handles rendering the descriptions of each notification setting option. We also in this diff need to extend the description prop in EnumSettingOption to be able to handle NotificationDescription

Depends on D12647

Test Plan:
Please see the demo video:

Reviewers: ashoat, inka

Reviewed By: ashoat

Subscribers: ashoat, tomek

Differential Revision: https://phab.comm.dev/D12648