[native] introduce disabled prop for EnumSettingsOption

Summary:
For the new thread notifications settings we will need to be able to disable the input. This diff introduces the disabled prop to EnumSettingsOption in anticipation of this

example of disabled input:

Depends on D12645

Test Plan:
Please see screenshots below

Reviewers: ashoat, inka

Reviewed By: ashoat

Subscribers: ashoat, tomek

Differential Revision: https://phab.comm.dev/D12653