Fix NPE on RN-Tester due to null mFabricViewStateManager

[cortinico]

Summary

RN-Tester is currently crashing at startup time due to an NPE.
This PR fixes it.

Changelog

[Android] [Fixed] - Fix NPE on ReactEditText due to null mFabricViewStateManager

Test Plan

Tested locally that RN Tester runs both in Debug and in Release

[facebook-github-bot]

@cortinico has imported this pull request. If you are a Meta employee, you can view this diff on Phabricator.

[analysis-bot]

Platform	Engine	Arch	Size (bytes)	Diff
android	hermes	arm64-v8a	7,785,778	+18
android	hermes	armeabi-v7a	7,189,430	+15
android	hermes	x86	8,097,146	+17
android	hermes	x86_64	8,074,776	+29
android	jsc	arm64-v8a	9,654,483	-12
android	jsc	armeabi-v7a	8,426,986	-5
android	jsc	x86	9,606,668	+7
android	jsc	x86_64	10,201,215	+8

Base commit: 26a5416
Branch: main

[analysis-bot]

Platform	Engine	Arch	Size (bytes)	Diff
ios	-	universal	n/a	--

Base commit: d315e9c
Branch: main

[react-native-bot]

This pull request was successfully merged by @cortinico in ba6bf5a.

^{When will my fix make it into a release? | Upcoming Releases}