[0.79] Fix UI Thread checker warning by initialize UIProxys before JS starts

[cipolleschi]

Target Branch(es)

0.79

Link to commit or PR to be picked

facebook/react-native@a51fa6c

Description

In bridge mode, we missed the call of RCTInitializeUIKitProxies, leading to UI API called on a background thread. bridgeless is ok because we call it when create host facebook/react-native#49600

This commit fixes that.

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[cortinico]

Let's hold off on this till RC2 as it's not immediately necessary

[cortinico]

@react-native-bot merge a51fa6c 0.79-stable

[react-native-bot]

✅ Successfully picked up your commit facebook/react-native@a51fa6c on the branch https://github.com/facebook/react-native/commits/0.79-stable