Change the default text for User-Created Policy Rooms

[luacmartins]

Details

Copy change for default user created policy rooms.

Fixed Issues

$ https://github.com/Expensify/Expensify/issues/176855

Tests

1. Click the '+' icon and select New room
2. Create a restricted room and verify that the welcome text reads: This is the beginning of #roomname, invite others by @mentioning them
3. Create a private room and verify that the welcome text reads: This is the beginning of the private #roomname room, invite others by @mentioning them
4. Create a chat with another user you haven't chatted with before and verify that the welcome text reads: This is the beginning of your chat history with <user name>.

QA Steps

Steps above.

Tested On

• Web
• Mobile Web
• Desktop
• iOS
• Android

Screenshots

Web

Mobile Web

Desktop

iOS

Android

[luacmartins]

While testing, I noticed inconsistencies with the avatar icon not showing up. Since that's rendered by another component and not part of this PR, I'd create a separate issue for that.

[OSBotify]

✋ This PR was not deployed to staging yet because QA is ongoing. It will be automatically deployed to staging after the next production release.

[OSBotify]

🚀 Deployed to staging by @Gonals in version: 1.1.29-6 🚀

platform	result
🤖 android 🤖	success ✅
🖥 desktop 🖥	success ✅
🍎 iOS 🍎	failure ❌
🕸 web 🕸	success ✅

[OSBotify]

🚀 Deployed to production by @roryabraham in version: 1.1.30-3 🚀

platform	result
🤖 android 🤖	success ✅
🖥 desktop 🖥	success ✅
🍎 iOS 🍎	success ✅
🕸 web 🕸	success ✅