[native] update remove keyserver text based on connection status

Summary:
In the designs for the keyserver selection bottomsheet, the text of the keyserver remove info and the remove button are different depending if you are connected to the selected keyserver or not. This diff introduces this functionality to the keyserver selection bottomsheet

For context here are the figma designs:

connected:

disconnected:

Linear task: https://linear.app/comm/issue/ENG-5469/introduce-keyserverselectionbottomsheet-component-ui

Depends on D9756

Test Plan:
Please see the screenshots below

connected:

disconnected:

Reviewers: inka, rohan, michal

Reviewed By: inka

Subscribers: ashoat, tomek, wyilio

Differential Revision: https://phab.comm.dev/D9794