[Feature] Add emoji search to mobile, plug the gap on cross-platform inconsistency

[JmillsExpensify]

Problem

Currently you can search for a specific emoji in the picker on web/desktop, but not in the mobile apps.

Why is this important?

We expect mobile and desktop to have perfect parity, but this is not currently the case.

Solution

Update the mobile emoji picker to also have a search feature

Upwork Automation - Do Not Edit

• Upwork Job URL: https://www.upwork.com/jobs/~018350435dc437a500
• Upwork Job ID: 1611497960351657984
• Last Price Increase: 2023-01-06

[melvin-bot]

Job added to Upwork: https://www.upwork.com/jobs/~018350435dc437a500

[melvin-bot]

Triggered auto assignment to Contributor Plus for review of internal employee PR - @mollfpr (Internal)

[JmillsExpensify]

We're pulling this issue into the public /App repo, so I'm going to copy over some of the more important comments.

First up from @stitesExpensify

For posterity so that I remember when coming back to this:
We use a bottom-docked popover for the emoji picker. This means that we can't use a keyboard avoiding view to move the picker above the keyboard and end up with something like this:

I'm thinking that the solution is going to be either to change the type of modal we use, or somehow detect the keyboard being opened and manually moving the anchor point (which is currently not used for mobile).

[puneetlath]

I think we should just do this like Slack where the modal content gets pushed up along with the keyboard.

RPReplay_Final1673052153.MP4

[shawnborton]

Yup, I agree with you @puneetlath

[JmillsExpensify]

Yeah, agreed. Slack does a nice job there.