[REALMS-7495] Can't post screenshot on realm feed

Update on this issue:

^{11 May 2022 by [Mojang] CornerHard} ^-

We should have a fix for this and commenting on Realms Feed posts in 1.19.10

The Bug:
I cannot post on the feed (Xbox Live club) of my realm!

Steps to Reproduce:
1. Go into the Realm
2. Hit the pause button and take a screenshot (camera button)
3. Attempt to post said screenshot on the Realm Feed (should pop up automatically after taking screenshot)

Observed Results:
The screenshot will not post.

Expected Results:
The screenshot should post.

Notes: This only started happening in 1.16.210 (Bedrock). Before that (in 1.16.201) I could post normally.