[native] add onPress function to keyserver selection list item

Summary:
This diff makes the keyserver selection list item into a TouchableOpacity and when the onPress function is triggered, navigates to the keyserver selection bottom sheet

Linear task: https://linear.app/comm/issue/ENG-5471/introduce-navigatetokeyserverselectionbottomsheet-hook

Linear task: https://linear.app/comm/issue/ENG-5471/introduce-navigatetokeyserverselectionbottomsheet-hook

Depends on D9754

Test Plan:
Please see the demo video below

Reviewers: inka, rohan, michal

Reviewed By: inka

Subscribers: ashoat, tomek, wyilio

Differential Revision: https://phab.comm.dev/D9756