[native] upgrade rn-emoji-keyboard to v1.5.1

Summary:
Our friends from rn-emoji-keyboard just released a new update to their emoji keyboard library which includes a fix for the bug mentioned in ENG-4277. This diff updates our usage of rn-emoji-keyboard to this latest version

Link to PR: https://github.com/TheWidlarzGroup/rn-emoji-keyboard/pull/149

Test Plan:
Check out the demo video to see that keyboard is no longer blocking the bottom emojis when the keyboard is open

Reviewers: atul, ashoat, kamil

Reviewed By: atul, ashoat

Subscribers: ashoat, tomek

Differential Revision: https://phab.comm.dev/D9087