[lib] change reaction message title/notif text from liked => reacted

Summary: change reaction message title/notif text from liked => reacted. This is the first step to improving the reaction message title/notif text

Test Plan:
Please see the screenshots to see the changes I made

Before:

After:

Reviewers: atul, tomek, rohan, ashoat

Reviewed By: rohan, ashoat

Subscribers: ashoat, tomek, atul

Differential Revision: https://phab.comm.dev/D6499