[native] implement new InlineEngagement design

Summary:
implemented the new InlineEngagement design. The new design splits the InlineEngagement into two separate parts

Depends on D6350
Linear Task: ENG-2720

Test Plan:
Please watch the demo video to see the new InlineEngagement

Reviewers: atul, tomek

Reviewed By: atul

Subscribers: ashoat, tomek, atul

Differential Revision: https://phab.comm.dev/D6351