docs(react-native): fix app build.gradle react config default paths

[monholm]

Summary:

Minor inconvenience I noticed while doing some testing in a mono-repo.

The current paths points to the android folder, but should point to the project root. Currently the android build fails if one uncomments the folder paths as they are.

Changelog:

[ANDROID] [FIXED] - Fix incorrect paths in app build.gradle react config block

Test Plan:

Uncomment the paths are they are and notice the android build error:

FAILURE: Build failed with an exception.

* What went wrong:
A problem occurred configuring project ':app'.
> Failed to notify project evaluation listener.
   > /xyz/xyz/xyz/xyz/RNPathTester/android/node_modules/react-native/ReactAndroid/gradle.properties (No such file or directory)

Use the updated paths and notice the build succeeds 🥳

[analysis-bot]

Platform	Engine	Arch	Size (bytes)	Diff
android	hermes	arm64-v8a	19,495,382	+3
android	hermes	armeabi-v7a	n/a	--
android	hermes	x86	n/a	--
android	hermes	x86_64	n/a	--
android	jsc	arm64-v8a	22,867,584	+12
android	jsc	armeabi-v7a	n/a	--
android	jsc	x86	n/a	--
android	jsc	x86_64	n/a	--

Base commit: deee037c62a7d62a349d34db427b14d3560ddf83 Branch: main

[facebook-github-bot]

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

[github-actions[bot]]

This pull request was successfully merged by @monholm in 2d8c6f591c3c17b75afced101a2f86e773e98a54.

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